78502072737156 has 24 divisors (see below), whose sum is σ = 187068769077120. Its totient is φ = 25610605289952.

The previous prime is 78502072737133. The next prime is 78502072737199. The reversal of 78502072737156 is 65173727020587.

It is a self number, because there is not a number n which added to its sum of digits gives 78502072737156.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69594035551 + ... + 69594036678.

It is an arithmetic number, because the mean of its divisors is an integer number (7794532044880).

Almost surely, 2^{78502072737156} is an apocalyptic number.

It is an amenable number.

78502072737156 is an abundant number, since it is smaller than the sum of its proper divisors (108566696339964).

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

78502072737156 is a wasteful number, since it uses less digits than its factorization.

78502072737156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139188072283 (or 139188072281 counting only the distinct ones).

The product of its (nonzero) digits is 34574400, while the sum is 60.

The spelling of 78502072737156 in words is "seventy-eight trillion, five hundred two billion, seventy-two million, seven hundred thirty-seven thousand, one hundred fifty-six".