78878344660137 has 48 divisors (see below), whose sum is σ = 126140653731456. Its totient is φ = 47095513920000.

The previous prime is 78878344660127. The next prime is 78878344660147. The reversal of 78878344660137 is 73106644387887.

78878344660137 is a `hidden beast` number, since 7 + 8 + 8 + 7 + 8 + 3 + 4 + 4 + 6 + 601 + 3 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (78878344660127) and next prime (78878344660147).

It is not a de Polignac number, because 78878344660137 - 2¹¹ = 78878344658089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78878344660127) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4831953 + ... + 13457505.

It is an arithmetic number, because the mean of its divisors is an integer number (2627930286072).

Almost surely, 2^{78878344660137} is an apocalyptic number.

It is an amenable number.

78878344660137 is a deficient number, since it is larger than the sum of its proper divisors (47262309071319).

78878344660137 is a wasteful number, since it uses less digits than its factorization.

78878344660137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8626942 (or 8626939 counting only the distinct ones).

The product of its (nonzero) digits is 910393344, while the sum is 72.

The spelling of 78878344660137 in words is "seventy-eight trillion, eight hundred seventy-eight billion, three hundred forty-four million, six hundred sixty thousand, one hundred thirty-seven".