78161573031394 has 32 divisors (see below), whose sum is σ = 128081617675200. Its totient is φ = 35626632706560.

The previous prime is 78161573031371. The next prime is 78161573031397. The reversal of 78161573031394 is 49313037516187.

It is a super-2 number, since 2×78161573031394² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78161573031397) 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, 201496864 + ... + 201884395.

It is an arithmetic number, because the mean of its divisors is an integer number (4002550552350).

Almost surely, 2^{78161573031394} is an apocalyptic number.

78161573031394 is a deficient number, since it is larger than the sum of its proper divisors (49920044643806).

78161573031394 is a wasteful number, since it uses less digits than its factorization.

78161573031394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403381458.

The product of its (nonzero) digits is 11430720, while the sum is 58.

The spelling of 78161573031394 in words is "seventy-eight trillion, one hundred sixty-one billion, five hundred seventy-three million, thirty-one thousand, three hundred ninety-four".