78051065616 has 80 divisors (see below), whose sum is σ = 233776168320. Its totient is φ = 24885843840.

The previous prime is 78051065611. The next prime is 78051065629. The reversal of 78051065616 is 61656015087.

78051065616 is a `hidden beast` number, since 7 + 80 + 5 + 1 + 0 + 6 + 561 + 6 = 666.

It is not an unprimeable number, because it can be changed into a prime (78051065611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3917755 + ... + 3937626.

It is an arithmetic number, because the mean of its divisors is an integer number (2922202104).

Almost surely, 2^78051065616 is an apocalyptic number.

It is an amenable number.

78051065616 is an abundant number, since it is smaller than the sum of its proper divisors (155725102704).

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

78051065616 is a wasteful number, since it uses less digits than its factorization.

78051065616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7855421 (or 7855409 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The spelling of 78051065616 in words is "seventy-eight billion, fifty-one million, sixty-five thousand, six hundred sixteen".