961238898531 has 12 divisors (see below), whose sum is σ = 1388474253400. Its totient is φ = 640817593920.

The previous prime is 961238898511. The next prime is 961238898541. The reversal of 961238898531 is 135898832169.

961238898531 is a `hidden beast` number, since 9 + 6 + 1 + 2 + 3 + 8 + 8 + 98 + 531 = 666.

It is not a de Polignac number, because 961238898531 - 2⁶ = 961238898467 is a prime.

It is a super-2 number, since 2×961238898531² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (961238898511) 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, 80796 + ... + 1388886.

Almost surely, 2^961238898531 is an apocalyptic number.

961238898531 is a deficient number, since it is larger than the sum of its proper divisors (427235354869).

961238898531 is a wasteful number, since it uses less digits than its factorization.

961238898531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1389746 (or 1389743 counting only the distinct ones).

The product of its digits is 22394880, while the sum is 63.

The spelling of 961238898531 in words is "nine hundred sixty-one billion, two hundred thirty-eight million, eight hundred ninety-eight thousand, five hundred thirty-one".