721523711013 has 32 divisors (see below), whose sum is σ = 1175249682432. Its totient is φ = 384754339200.

The previous prime is 721523710987. The next prime is 721523711057. The reversal of 721523711013 is 310117325127.

It is not a de Polignac number, because 721523711013 - 2¹³ = 721523702821 is a prime.

It is a super-2 number, since 2×721523711013² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721523721013) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18197733 + ... + 18237338.

It is an arithmetic number, because the mean of its divisors is an integer number (36726552576).

Almost surely, 2^721523711013 is an apocalyptic number.

It is an amenable number.

721523711013 is a deficient number, since it is larger than the sum of its proper divisors (453725971419).

721523711013 is a wasteful number, since it uses less digits than its factorization.

721523711013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36435145.

The product of its (nonzero) digits is 8820, while the sum is 33.

The spelling of 721523711013 in words is "seven hundred twenty-one billion, five hundred twenty-three million, seven hundred eleven thousand, thirteen".