72157435312272 has 40 divisors (see below), whose sum is σ = 186407911746144. Its totient is φ = 24052323101184.

The previous prime is 72157435312253. The next prime is 72157435312289. The reversal of 72157435312272 is 27221353475127.

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, 2779303 + ... + 12330425.

Almost surely, 2^{72157435312272} is an apocalyptic number.

It is an amenable number.

72157435312272 is an abundant number, since it is smaller than the sum of its proper divisors (114250476433872).

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

72157435312272 is a wasteful number, since it uses less digits than its factorization.

72157435312272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9708527 (or 9708521 counting only the distinct ones).

The product of its digits is 4939200, while the sum is 51.

Adding to 72157435312272 its reverse (27221353475127), we get a palindrome (99378788787399).

The spelling of 72157435312272 in words is "seventy-two trillion, one hundred fifty-seven billion, four hundred thirty-five million, three hundred twelve thousand, two hundred seventy-two".