78465812785072 has 20 divisors (see below), whose sum is σ = 153034316992816. Its totient is φ = 38973085819200.

The previous prime is 78465812785057. The next prime is 78465812785079. The reversal of 78465812785072 is 27058721856487.

It is a junction number, because it is equal to n+sod(n) for n = 78465812784992 and 78465812785010.

It is not an unprimeable number, because it can be changed into a prime (78465812785079) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16238783343 + ... + 16238788174.

Almost surely, 2^{78465812785072} is an apocalyptic number.

It is an amenable number.

78465812785072 is a deficient number, since it is larger than the sum of its proper divisors (74568504207744).

78465812785072 is a wasteful number, since it uses less digits than its factorization.

78465812785072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32477571676 (or 32477571670 counting only the distinct ones).

The product of its (nonzero) digits is 421478400, while the sum is 70.

The spelling of 78465812785072 in words is "seventy-eight trillion, four hundred sixty-five billion, eight hundred twelve million, seven hundred eighty-five thousand, seventy-two".