721533474700451 has 16 divisors (see below), whose sum is σ = 825150509159424. Its totient is φ = 618051652428384.

The previous prime is 721533474700433. The next prime is 721533474700453. The reversal of 721533474700451 is 154007474335127.

It is a cyclic number.

It is not a de Polignac number, because 721533474700451 - 2¹⁸ = 721533474438307 is a prime.

It is a super-2 number, since 2×721533474700451² (a number of 31 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 721533474700393 and 721533474700402.

It is not an unprimeable number, because it can be changed into a prime (721533474700453) 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, 2584399301 + ... + 2584678473.

It is an arithmetic number, because the mean of its divisors is an integer number (51571906822464).

Almost surely, 2^{721533474700451} is an apocalyptic number.

721533474700451 is a deficient number, since it is larger than the sum of its proper divisors (103617034458973).

721533474700451 is a wasteful number, since it uses less digits than its factorization.

721533474700451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520010.

The product of its (nonzero) digits is 9878400, while the sum is 53.

The spelling of 721533474700451 in words is "seven hundred twenty-one trillion, five hundred thirty-three billion, four hundred seventy-four million, seven hundred thousand, four hundred fifty-one".