78107410185138 has 32 divisors (see below), whose sum is σ = 173575970853120. Its totient is φ = 26035211162160.

The previous prime is 78107410185137. The next prime is 78107410185157. The reversal of 78107410185138 is 83158101470187.

78107410185138 is a `hidden beast` number, since 7 + 8 + 10 + 7 + 4 + 101 + 8 + 513 + 8 = 666.

It is a super-2 number, since 2×78107410185138² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (78107410185137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14051770 + ... + 18806037.

It is an arithmetic number, because the mean of its divisors is an integer number (5424249089160).

Almost surely, 2^{78107410185138} is an apocalyptic number.

78107410185138 is an abundant number, since it is smaller than the sum of its proper divisors (95468560667982).

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

78107410185138 is a wasteful number, since it uses less digits than its factorization.

78107410185138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32901839 (or 32901833 counting only the distinct ones).

The product of its (nonzero) digits is 1505280, while the sum is 54.

The spelling of 78107410185138 in words is "seventy-eight trillion, one hundred seven billion, four hundred ten million, one hundred eighty-five thousand, one hundred thirty-eight".