78372645468634 has 32 divisors (see below), whose sum is σ = 136105096511232. Its totient is φ = 33450612288000.

The previous prime is 78372645468599. The next prime is 78372645468683. The reversal of 78372645468634 is 43686454627387.

It is a super-2 number, since 2×78372645468634² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 242939187 + ... + 243261574.

It is an arithmetic number, because the mean of its divisors is an integer number (4253284265976).

Almost surely, 2^{78372645468634} is an apocalyptic number.

78372645468634 is a deficient number, since it is larger than the sum of its proper divisors (57732451042598).

78372645468634 is a wasteful number, since it uses less digits than its factorization.

78372645468634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486201222.

The product of its digits is 3901685760, while the sum is 73.

The spelling of 78372645468634 in words is "seventy-eight trillion, three hundred seventy-two billion, six hundred forty-five million, four hundred sixty-eight thousand, six hundred thirty-four".