78185670252516 has 24 divisors (see below), whose sum is σ = 202703589543840. Its totient is φ = 26061890084136.

The previous prime is 78185670252499. The next prime is 78185670252587. The reversal of 78185670252516 is 61525207658187.

It is a happy number.

78185670252516 is a `hidden beast` number, since 7 + 8 + 1 + 8 + 5 + 67 + 0 + 2 + 52 + 516 = 666.

It is a super-2 number, since 2×78185670252516² (a number of 29 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

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, 361970695506 + ... + 361970695721.

It is an arithmetic number, because the mean of its divisors is an integer number (8445982897660).

Almost surely, 2^{78185670252516} is an apocalyptic number.

It is an amenable number.

78185670252516 is an abundant number, since it is smaller than the sum of its proper divisors (124517919291324).

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

78185670252516 is a wasteful number, since it uses less digits than its factorization.

78185670252516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723941391240 (or 723941391232 counting only the distinct ones).

The product of its (nonzero) digits is 56448000, while the sum is 63.

The spelling of 78185670252516 in words is "seventy-eight trillion, one hundred eighty-five billion, six hundred seventy million, two hundred fifty-two thousand, five hundred sixteen".