6425663550 has 24 divisors (see below), whose sum is σ = 15935645976. Its totient is φ = 1713510240.

The previous prime is 6425663533. The next prime is 6425663551. The reversal of 6425663550 is 553665246.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6425663551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21418729 + ... + 21419028.

It is an arithmetic number, because the mean of its divisors is an integer number (663985249).

Almost surely, 2^6425663550 is an apocalyptic number.

6425663550 is an abundant number, since it is smaller than the sum of its proper divisors (9509982426).

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

6425663550 is a wasteful number, since it uses less digits than its factorization.

6425663550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42837772 (or 42837767 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 42.

The square root of 6425663550 is about 80160.2367137223. The cubic root of 6425663550 is about 1859.1138830367.

The spelling of 6425663550 in words is "six billion, four hundred twenty-five million, six hundred sixty-three thousand, five hundred fifty".