6486731550 has 144 divisors (see below), whose sum is σ = 18810202320. Its totient is φ = 1593169920.

The previous prime is 6486731519. The next prime is 6486731551. The reversal of 6486731550 is 551376846.

6486731550 is a `hidden beast` number, since 6 + 4 + 8 + 67 + 31 + 550 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 6486731496 and 6486731505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6486731551) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3433006 + ... + 3434894.

It is an arithmetic number, because the mean of its divisors is an integer number (130626405).

Almost surely, 2^6486731550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6486731550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9405101160).

6486731550 is an abundant number, since it is smaller than the sum of its proper divisors (12323470770).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6486731550 is a wasteful number, since it uses less digits than its factorization.

6486731550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2507 (or 2499 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 45.

The square root of 6486731550 is about 80540.2480130276. The cubic root of 6486731550 is about 1864.9848508666.

The spelling of 6486731550 in words is "six billion, four hundred eighty-six million, seven hundred thirty-one thousand, five hundred fifty".