78908364155 has 16 divisors (see below), whose sum is σ = 96841319040. Its totient is φ = 61696298112.

The previous prime is 78908364133. The next prime is 78908364221. The reversal of 78908364155 is 55146380987.

It is a cyclic number.

It is not a de Polignac number, because 78908364155 - 2⁸ = 78908363899 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78908364155.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70184 + ... + 403413.

It is an arithmetic number, because the mean of its divisors is an integer number (6052582440).

Almost surely, 2^78908364155 is an apocalyptic number.

78908364155 is a deficient number, since it is larger than the sum of its proper divisors (17932954885).

78908364155 is a wasteful number, since it uses less digits than its factorization.

78908364155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474358.

The product of its (nonzero) digits is 7257600, while the sum is 56.

The spelling of 78908364155 in words is "seventy-eight billion, nine hundred eight million, three hundred sixty-four thousand, one hundred fifty-five".