72180412936 has 16 divisors (see below), whose sum is σ = 136326146940. Its totient is φ = 35826773760.

The previous prime is 72180412933. The next prime is 72180412937. The reversal of 72180412936 is 63921408127.

It can be written as a sum of positive squares in 2 ways, for example, as 71722196100 + 458216836 = 267810^2 + 21406^2 .

It is a super-2 number, since 2×72180412936² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 72180412892 and 72180412901.

It is not an unprimeable number, because it can be changed into a prime (72180412933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32927925 + ... + 32930116.

Almost surely, 2^72180412936 is an apocalyptic number.

It is an amenable number.

72180412936 is a deficient number, since it is larger than the sum of its proper divisors (64145734004).

72180412936 is a wasteful number, since it uses less digits than its factorization.

72180412936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65858184 (or 65858180 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 43.

The spelling of 72180412936 in words is "seventy-two billion, one hundred eighty million, four hundred twelve thousand, nine hundred thirty-six".