91530639099 has 6 divisors (see below), whose sum is σ = 132210923156. Its totient is φ = 61020426060.

The previous prime is 91530639089. The next prime is 91530639107. The reversal of 91530639099 is 99093603519.

It is a happy number.

It is not a de Polignac number, because 91530639099 - 2²⁷ = 91396421371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91530639049) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5085035497 + ... + 5085035514.

Almost surely, 2^91530639099 is an apocalyptic number.

91530639099 is a deficient number, since it is larger than the sum of its proper divisors (40680284057).

91530639099 is a wasteful number, since it uses less digits than its factorization.

91530639099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10170071017 (or 10170071014 counting only the distinct ones).

The product of its (nonzero) digits is 1771470, while the sum is 54.

The spelling of 91530639099 in words is "ninety-one billion, five hundred thirty million, six hundred thirty-nine thousand, ninety-nine".