78128668996 has 24 divisors (see below), whose sum is σ = 163051136640. Its totient is φ = 32027901312.

The previous prime is 78128668991. The next prime is 78128669221. The reversal of 78128668996 is 69986682187.

It is a super-2 number, since 2×78128668996² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78128668991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60658261 + ... + 60659548.

It is an arithmetic number, because the mean of its divisors is an integer number (6793797360).

Almost surely, 2^78128668996 is an apocalyptic number.

It is an amenable number.

78128668996 is an abundant number, since it is smaller than the sum of its proper divisors (84922467644).

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

78128668996 is a wasteful number, since it uses less digits than its factorization.

78128668996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121317843 (or 121317841 counting only the distinct ones).

The product of its digits is 125411328, while the sum is 70.

The spelling of 78128668996 in words is "seventy-eight billion, one hundred twenty-eight million, six hundred sixty-eight thousand, nine hundred ninety-six".