78297178156 has 12 divisors (see below), whose sum is σ = 137237213680. Its totient is φ = 39086545680.

The previous prime is 78297178121. The next prime is 78297178163. The reversal of 78297178156 is 65187179287.

It is a super-2 number, since 2×78297178156² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78297178094 and 78297178103.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15508011 + ... + 15513058.

Almost surely, 2^78297178156 is an apocalyptic number.

It is an amenable number.

78297178156 is a deficient number, since it is larger than the sum of its proper divisors (58940035524).

78297178156 is a wasteful number, since it uses less digits than its factorization.

78297178156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31021704 (or 31021702 counting only the distinct ones).

The product of its digits is 11854080, while the sum is 61.

The spelling of 78297178156 in words is "seventy-eight billion, two hundred ninety-seven million, one hundred seventy-eight thousand, one hundred fifty-six".