78507908677 has 8 divisors (see below), whose sum is σ = 86923275552. Its totient is φ = 70305589200.

The previous prime is 78507908671. The next prime is 78507908707. The reversal of 78507908677 is 77680970587.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-78507908677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78507908671) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53261074 + ... + 53262547.

It is an arithmetic number, because the mean of its divisors is an integer number (10865409444).

Almost surely, 2^78507908677 is an apocalyptic number.

It is an amenable number.

78507908677 is a deficient number, since it is larger than the sum of its proper divisors (8415366875).

78507908677 is a wasteful number, since it uses less digits than its factorization.

78507908677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106523699.

The product of its (nonzero) digits is 41489280, while the sum is 64.

The spelling of 78507908677 in words is "seventy-eight billion, five hundred seven million, nine hundred eight thousand, six hundred seventy-seven".