78658506136 has 32 divisors (see below), whose sum is σ = 168773220000. Its totient is φ = 33666932736.

The previous prime is 78658506083. The next prime is 78658506169. The reversal of 78658506136 is 63160585687.

It is a congruent number.

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, 870211 + ... + 956338.

It is an arithmetic number, because the mean of its divisors is an integer number (5274163125).

Almost surely, 2^78658506136 is an apocalyptic number.

It is an amenable number.

78658506136 is an abundant number, since it is smaller than the sum of its proper divisors (90114713864).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78658506136 is a wasteful number, since it uses less digits than its factorization.

78658506136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1827331 (or 1827327 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 55.

It can be divided in two parts, 7865 and 8506136, that added together give a triangular number (8514001 = T₄₁₂₆).

The spelling of 78658506136 in words is "seventy-eight billion, six hundred fifty-eight million, five hundred six thousand, one hundred thirty-six".