76978861650 has 48 divisors (see below), whose sum is σ = 212119533600. Its totient is φ = 20527696080.

The previous prime is 76978861643. The next prime is 76978861711. The reversal of 76978861650 is 5616887967.

76978861650 is a `hidden beast` number, since 7 + 6 + 9 + 7 + 8 + 8 + 616 + 5 + 0 = 666.

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 23 ways as a sum of consecutive naturals, for example, 28509340 + ... + 28512039.

It is an arithmetic number, because the mean of its divisors is an integer number (4419156950).

Almost surely, 2^76978861650 is an apocalyptic number.

76978861650 is an abundant number, since it is smaller than the sum of its proper divisors (135140671950).

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

76978861650 is a wasteful number, since it uses less digits than its factorization.

76978861650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57021400 (or 57021389 counting only the distinct ones).

The product of its (nonzero) digits is 30481920, while the sum is 63.

The spelling of 76978861650 in words is "seventy-six billion, nine hundred seventy-eight million, eight hundred sixty-one thousand, six hundred fifty".