9812311641 has 24 divisors (see below), whose sum is σ = 15485389920. Its totient is φ = 5937792000.

The previous prime is 9812311637. The next prime is 9812311643. The reversal of 9812311641 is 1461132189.

9812311641 is a `hidden beast` number, since 9 + 8 + 1 + 2 + 3 + 1 + 1 + 641 = 666.

It is not a de Polignac number, because 9812311641 - 2² = 9812311637 is a prime.

It is a super-2 number, since 2×9812311641² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 9812311596 and 9812311605.

It is not an unprimeable number, because it can be changed into a prime (9812311643) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9960 + ... + 140441.

It is an arithmetic number, because the mean of its divisors is an integer number (645224580).

Almost surely, 2^9812311641 is an apocalyptic number.

It is an amenable number.

9812311641 is a deficient number, since it is larger than the sum of its proper divisors (5673078279).

9812311641 is a wasteful number, since it uses less digits than its factorization.

9812311641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151077 (or 151074 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 9812311641 is about 99057.1130257691. The cubic root of 9812311641 is about 2140.8707290953.

The spelling of 9812311641 in words is "nine billion, eight hundred twelve million, three hundred eleven thousand, six hundred forty-one".