721262632131 has 6 divisors (see below), whose sum is σ = 1041823801980. Its totient is φ = 480841754748.

The previous prime is 721262632093. The next prime is 721262632219. The reversal of 721262632131 is 131236262127.

721262632131 is a `hidden beast` number, since 7 + 2 + 1 + 2 + 6 + 2 + 632 + 13 + 1 = 666.

It is not a de Polignac number, because 721262632131 - 2¹⁵ = 721262599363 is a prime.

It is a super-2 number, since 2×721262632131² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (721262632031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 40070146221 + ... + 40070146238.

It is an arithmetic number, because the mean of its divisors is an integer number (173637300330).

Almost surely, 2^721262632131 is an apocalyptic number.

721262632131 is a deficient number, since it is larger than the sum of its proper divisors (320561169849).

721262632131 is a wasteful number, since it uses less digits than its factorization.

721262632131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80140292465 (or 80140292462 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

Adding to 721262632131 its reverse (131236262127), we get a palindrome (852498894258).

The spelling of 721262632131 in words is "seven hundred twenty-one billion, two hundred sixty-two million, six hundred thirty-two thousand, one hundred thirty-one".