78375256377 has 64 divisors (see below), whose sum is σ = 116803399680. Its totient is φ = 46349452800.

The previous prime is 78375256373. The next prime is 78375256397. The reversal of 78375256377 is 77365257387.

It is a happy number.

It is not a de Polignac number, because 78375256377 - 2² = 78375256373 is a prime.

It is a super-2 number, since 2×78375256377² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78375256377.

It is not an unprimeable number, because it can be changed into a prime (78375256373) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 113422602 + ... + 113423292.

It is an arithmetic number, because the mean of its divisors is an integer number (1825053120).

Almost surely, 2^78375256377 is an apocalyptic number.

It is an amenable number.

78375256377 is a deficient number, since it is larger than the sum of its proper divisors (38428143303).

78375256377 is a wasteful number, since it uses less digits than its factorization.

78375256377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1214.

The product of its digits is 51861600, while the sum is 60.

The spelling of 78375256377 in words is "seventy-eight billion, three hundred seventy-five million, two hundred fifty-six thousand, three hundred seventy-seven".