78180587784188 has 12 divisors (see below), whose sum is σ = 136818536491560. Its totient is φ = 39089577358032.

The previous prime is 78180587784163. The next prime is 78180587784197. The reversal of 78180587784188 is 88148778508187.

It is a super-2 number, since 2×78180587784188² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 178887983 + ... + 179324486.

It is an arithmetic number, because the mean of its divisors is an integer number (11401544707630).

Almost surely, 2^{78180587784188} is an apocalyptic number.

It is an amenable number.

78180587784188 is a deficient number, since it is larger than the sum of its proper divisors (58637948707372).

78180587784188 is a wasteful number, since it uses less digits than its factorization.

78180587784188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358267036 (or 358267034 counting only the distinct ones).

The product of its (nonzero) digits is 1798307840, while the sum is 80.

The spelling of 78180587784188 in words is "seventy-eight trillion, one hundred eighty billion, five hundred eighty-seven million, seven hundred eighty-four thousand, one hundred eighty-eight".