78510345655 has 32 divisors (see below), whose sum is σ = 108794544768. Its totient is φ = 53274624000.

The previous prime is 78510345637. The next prime is 78510345677. The reversal of 78510345655 is 55654301587.

It is not a de Polignac number, because 78510345655 - 2²³ = 78501957047 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78510345599 and 78510345608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8454615 + ... + 8463895.

It is an arithmetic number, because the mean of its divisors is an integer number (3399829524).

Almost surely, 2^78510345655 is an apocalyptic number.

78510345655 is a deficient number, since it is larger than the sum of its proper divisors (30284199113).

78510345655 is a wasteful number, since it uses less digits than its factorization.

78510345655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11787.

The product of its (nonzero) digits is 2520000, while the sum is 49.

The spelling of 78510345655 in words is "seventy-eight billion, five hundred ten million, three hundred forty-five thousand, six hundred fifty-five".