91032918953 has 4 divisors (see below), whose sum is σ = 91074243408. Its totient is φ = 90991594500.

The previous prime is 91032918887. The next prime is 91032918967. The reversal of 91032918953 is 35981923019.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 91032918953 - 2²² = 91028724649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91032918983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20658923 + ... + 20663328.

It is an arithmetic number, because the mean of its divisors is an integer number (22768560852).

Almost surely, 2^91032918953 is an apocalyptic number.

It is an amenable number.

91032918953 is a deficient number, since it is larger than the sum of its proper divisors (41324455).

91032918953 is a wasteful number, since it uses less digits than its factorization.

91032918953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41324454.

The product of its (nonzero) digits is 524880, while the sum is 50.

The spelling of 91032918953 in words is "ninety-one billion, thirty-two million, nine hundred eighteen thousand, nine hundred fifty-three".