78265813178 has 16 divisors (see below), whose sum is σ = 134450081280. Its totient is φ = 33472462416.

The previous prime is 78265813163. The next prime is 78265813201. The reversal of 78265813178 is 87131856287.

It is a super-2 number, since 2×78265813178² (a number of 23 digits) contains 22 as substring.

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, 5828801 + ... + 5842212.

It is an arithmetic number, because the mean of its divisors is an integer number (8403130080).

Almost surely, 2^78265813178 is an apocalyptic number.

78265813178 is a deficient number, since it is larger than the sum of its proper divisors (56184268102).

78265813178 is a wasteful number, since it uses less digits than its factorization.

78265813178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11671501.

The product of its digits is 4515840, while the sum is 56.

The spelling of 78265813178 in words is "seventy-eight billion, two hundred sixty-five million, eight hundred thirteen thousand, one hundred seventy-eight".