7764680730 has 64 divisors (see below), whose sum is σ = 19069240320. Its totient is φ = 2022698496.

The previous prime is 7764680717. The next prime is 7764680741. The reversal of 7764680730 is 370864677.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 7764680730.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 359991 + ... + 380949.

It is an arithmetic number, because the mean of its divisors is an integer number (297956880).

Almost surely, 2^7764680730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7764680730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9534620160).

7764680730 is an abundant number, since it is smaller than the sum of its proper divisors (11304559590).

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

7764680730 is a wasteful number, since it uses less digits than its factorization.

7764680730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21255.

The product of its (nonzero) digits is 1185408, while the sum is 48.

The square root of 7764680730 is about 88117.4258021647. The cubic root of 7764680730 is about 1980.1945809181.

The spelling of 7764680730 in words is "seven billion, seven hundred sixty-four million, six hundred eighty thousand, seven hundred thirty".