72561377567432 has 32 divisors (see below), whose sum is σ = 155136881907000. Its totient is φ = 31519874417664.

The previous prime is 72561377567417. The next prime is 72561377567467. The reversal of 72561377567432 is 23476577316527.

It can be written as a sum of positive squares in 4 ways, for example, as 52120978104196 + 20440399463236 = 7219486^2 + 4521106^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20520749807 + ... + 20520753342.

Almost surely, 2^{72561377567432} is an apocalyptic number.

It is an amenable number.

72561377567432 is an abundant number, since it is smaller than the sum of its proper divisors (82575504339568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72561377567432 is a wasteful number, since it uses less digits than its factorization.

72561377567432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41041503185 (or 41041503181 counting only the distinct ones).

The product of its digits is 311169600, while the sum is 65.

The spelling of 72561377567432 in words is "seventy-two trillion, five hundred sixty-one billion, three hundred seventy-seven million, five hundred sixty-seven thousand, four hundred thirty-two".