9864928631 has 4 divisors (see below), whose sum is σ = 9916577664. Its totient is φ = 9813279600.

The previous prime is 9864928621. The next prime is 9864928651. The reversal of 9864928631 is 1368294689.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9864928631 - 2²⁶ = 9797819767 is a prime.

It is a super-2 number, since 2×9864928631² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9864928621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25824230 + ... + 25824611.

It is an arithmetic number, because the mean of its divisors is an integer number (2479144416).

Almost surely, 2^9864928631 is an apocalyptic number.

9864928631 is a deficient number, since it is larger than the sum of its proper divisors (51649033).

9864928631 is a wasteful number, since it uses less digits than its factorization.

9864928631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51649032.

The product of its digits is 4478976, while the sum is 56.

The square root of 9864928631 is about 99322.3470876519. The cubic root of 9864928631 is about 2144.6906044512.

The spelling of 9864928631 in words is "nine billion, eight hundred sixty-four million, nine hundred twenty-eight thousand, six hundred thirty-one".