91005000475 has 12 divisors (see below), whose sum is σ = 112873501576. Its totient is φ = 72786386880.

The previous prime is 91005000469. The next prime is 91005000479. The reversal of 91005000475 is 57400050019.

It is not a de Polignac number, because 91005000475 - 2¹³ = 91004992283 is a prime.

It is a super-2 number, since 2×91005000475² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91005000479) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 334437 + ... + 542086.

Almost surely, 2^91005000475 is an apocalyptic number.

91005000475 is a deficient number, since it is larger than the sum of its proper divisors (21868501101).

91005000475 is a wasteful number, since it uses less digits than its factorization.

91005000475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880686 (or 880681 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 31.

The spelling of 91005000475 in words is "ninety-one billion, five million, four hundred seventy-five", and thus it is an aban number.