72178734934 has 24 divisors (see below), whose sum is σ = 114360716160. Its totient is φ = 34161687792.

The previous prime is 72178734907. The next prime is 72178734937. The reversal of 72178734934 is 43943787127.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72178734937) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 846667 + ... + 928009.

It is an arithmetic number, because the mean of its divisors is an integer number (4765029840).

Almost surely, 2^72178734934 is an apocalyptic number.

72178734934 is a deficient number, since it is larger than the sum of its proper divisors (42181981226).

72178734934 is a wasteful number, since it uses less digits than its factorization.

72178734934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82612 (or 82593 counting only the distinct ones).

The product of its digits is 7112448, while the sum is 55.

The spelling of 72178734934 in words is "seventy-two billion, one hundred seventy-eight million, seven hundred thirty-four thousand, nine hundred thirty-four".