78118388381187 has 72 divisors (see below), whose sum is σ = 142616109871872. Its totient is φ = 40332017262240.

The previous prime is 78118388381179. The next prime is 78118388381221.

78118388381187 is a `hidden beast` number, since 7 + 8 + 11 + 83 + 88 + 381 + 1 + 87 = 666.

78118388381187 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 78118388381187 - 2³ = 78118388381179 is a prime.

It is a super-2 number, since 2×78118388381187² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78118388381167) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 30192183 + ... + 32677280.

It is an arithmetic number, because the mean of its divisors is an integer number (1980779303776).

Almost surely, 2^{78118388381187} is an apocalyptic number.

78118388381187 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

78118388381187 is a deficient number, since it is larger than the sum of its proper divisors (64497721490685).

78118388381187 is a wasteful number, since it uses less digits than its factorization.

78118388381187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62869661 (or 62869647 counting only the distinct ones).

The product of its digits is 115605504, while the sum is 72.

The spelling of 78118388381187 in words is "seventy-eight trillion, one hundred eighteen billion, three hundred eighty-eight million, three hundred eighty-one thousand, one hundred eighty-seven".