72637056200421 has 12 divisors (see below), whose sum is σ = 105069864470220. Its totient is φ = 48355624665600.

The previous prime is 72637056200339. The next prime is 72637056200453. The reversal of 72637056200421 is 12400265073627.

72637056200421 is a `hidden beast` number, since 7 + 2 + 6 + 370 + 56 + 200 + 4 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 37348537709025 + 35288518491396 = 6111345^2 + 5940414^2 .

It is not a de Polignac number, because 72637056200421 - 2²² = 72637052006117 is a prime.

It is a super-2 number, since 2×72637056200421² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72637056200521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5756615676 + ... + 5756628293.

It is an arithmetic number, because the mean of its divisors is an integer number (8755822039185).

Almost surely, 2^{72637056200421} is an apocalyptic number.

It is an amenable number.

72637056200421 is a deficient number, since it is larger than the sum of its proper divisors (32432808269799).

72637056200421 is a wasteful number, since it uses less digits than its factorization.

72637056200421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11513244676 (or 11513244673 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 45.

The spelling of 72637056200421 in words is "seventy-two trillion, six hundred thirty-seven billion, fifty-six million, two hundred thousand, four hundred twenty-one".