9621630315591 has 64 divisors (see below), whose sum is σ = 15224229504000. Its totient is φ = 5402075952000.

The previous prime is 9621630315587. The next prime is 9621630315593. The reversal of 9621630315591 is 1955130361269.

It is not a de Polignac number, because 9621630315591 - 2² = 9621630315587 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9621630315593) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 13261345 + ... + 13968053.

It is an arithmetic number, because the mean of its divisors is an integer number (237878586000).

Almost surely, 2^{9621630315591} is an apocalyptic number.

9621630315591 is a deficient number, since it is larger than the sum of its proper divisors (5602599188409).

9621630315591 is a wasteful number, since it uses less digits than its factorization.

9621630315591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706965 (or 706951 counting only the distinct ones).

The product of its (nonzero) digits is 1312200, while the sum is 51.

The spelling of 9621630315591 in words is "nine trillion, six hundred twenty-one billion, six hundred thirty million, three hundred fifteen thousand, five hundred ninety-one".