72437413657 has 16 divisors (see below), whose sum is σ = 83000912512. Its totient is φ = 61927908480.

The previous prime is 72437413651. The next prime is 72437413709. The reversal of 72437413657 is 75631473427.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 72437413657 - 2²³ = 72429025049 is a prime.

It is a super-2 number, since 2×72437413657² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 72437413657.

It is not an unprimeable number, because it can be changed into a prime (72437413651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6060307 + ... + 6072247.

It is an arithmetic number, because the mean of its divisors is an integer number (5187557032).

Almost surely, 2^72437413657 is an apocalyptic number.

It is an amenable number.

72437413657 is a deficient number, since it is larger than the sum of its proper divisors (10563498855).

72437413657 is a wasteful number, since it uses less digits than its factorization.

72437413657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14128.

The product of its digits is 2963520, while the sum is 49.

The spelling of 72437413657 in words is "seventy-two billion, four hundred thirty-seven million, four hundred thirteen thousand, six hundred fifty-seven".