96917856021 has 200 divisors, whose sum is σ = 180381890304. Its totient is φ = 51734168640.

The previous prime is 96917856019. The next prime is 96917856031. The reversal of 96917856021 is 12065871969.

96917856021 is a `hidden beast` number, since 9 + 6 + 9 + 1 + 78 + 560 + 2 + 1 = 666.

It is not a de Polignac number, because 96917856021 - 2¹ = 96917856019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (96917856011) by changing a digit.

It is a polite number, since it can be written in 199 ways as a sum of consecutive naturals, for example, 210233731 + ... + 210234191.

Almost surely, 2^96917856021 is an apocalyptic number.

It is an amenable number.

96917856021 is a deficient number, since it is larger than the sum of its proper divisors (83464034283).

96917856021 is an equidigital number, since it uses as much as digits as its factorization.

96917856021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571 (or 541 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 54.

The spelling of 96917856021 in words is "ninety-six billion, nine hundred seventeen million, eight hundred fifty-six thousand, twenty-one".