72557641734 has 32 divisors (see below), whose sum is σ = 150137176320. Its totient is φ = 23349097632.

The previous prime is 72557641733. The next prime is 72557641781. The reversal of 72557641734 is 43714675527.

It is a super-2 number, since 2×72557641734² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72557641733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1835809 + ... + 1874915.

It is an arithmetic number, because the mean of its divisors is an integer number (4691786760).

Almost surely, 2^72557641734 is an apocalyptic number.

72557641734 is an abundant number, since it is smaller than the sum of its proper divisors (77579534586).

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

72557641734 is a wasteful number, since it uses less digits than its factorization.

72557641734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49804.

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

The spelling of 72557641734 in words is "seventy-two billion, five hundred fifty-seven million, six hundred forty-one thousand, seven hundred thirty-four".