9961373136 has 80 divisors (see below), whose sum is σ = 30232440000. Its totient is φ = 2786396160.

The previous prime is 9961373111. The next prime is 9961373153. The reversal of 9961373136 is 6313731699.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 718761 + ... + 732488.

It is an arithmetic number, because the mean of its divisors is an integer number (377905500).

Almost surely, 2^9961373136 is an apocalyptic number.

It is an amenable number.

9961373136 is an abundant number, since it is smaller than the sum of its proper divisors (20271066864).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9961373136 is a wasteful number, since it uses less digits than its factorization.

9961373136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1451284 (or 1451278 counting only the distinct ones).

The product of its digits is 551124, while the sum is 48.

The square root of 9961373136 is about 99806.6788145964. The cubic root of 9961373136 is about 2151.6571421651.

The spelling of 9961373136 in words is "nine billion, nine hundred sixty-one million, three hundred seventy-three thousand, one hundred thirty-six".