78776650920 has 64 divisors (see below), whose sum is σ = 257814498240. Its totient is φ = 19097369600.

The previous prime is 78776650913. The next prime is 78776650957. The reversal of 78776650920 is 2905667787.

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 15 ways as a sum of consecutive naturals, for example, 29838321 + ... + 29840960.

It is an arithmetic number, because the mean of its divisors is an integer number (4028351535).

Almost surely, 2^78776650920 is an apocalyptic number.

It is an amenable number.

78776650920 is an abundant number, since it is smaller than the sum of its proper divisors (179037847320).

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

78776650920 is a wasteful number, since it uses less digits than its factorization.

78776650920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59679306 (or 59679302 counting only the distinct ones).

The product of its (nonzero) digits is 8890560, while the sum is 57.

The spelling of 78776650920 in words is "seventy-eight billion, seven hundred seventy-six million, six hundred fifty thousand, nine hundred twenty".