91630429565921 has 8 divisors (see below), whose sum is σ = 91764161038944. Its totient is φ = 91496753488000.

The previous prime is 91630429565891. The next prime is 91630429565929. The reversal of 91630429565921 is 12956592403619.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91630429565921 - 2¹⁴ = 91630429549537 is a prime.

It is a super-2 number, since 2×91630429565921² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91630429565929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10537535 + ... + 17155188.

It is an arithmetic number, because the mean of its divisors is an integer number (11470520129868).

Almost surely, 2^{91630429565921} is an apocalyptic number.

It is an amenable number.

91630429565921 is a deficient number, since it is larger than the sum of its proper divisors (133731473023).

91630429565921 is a wasteful number, since it uses less digits than its factorization.

91630429565921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27697551.

The product of its (nonzero) digits is 31492800, while the sum is 62.

The spelling of 91630429565921 in words is "ninety-one trillion, six hundred thirty billion, four hundred twenty-nine million, five hundred sixty-five thousand, nine hundred twenty-one".