91500548957 has 4 divisors (see below), whose sum is σ = 91502062080. Its totient is φ = 91499035836.

The previous prime is 91500548861. The next prime is 91500548969. The reversal of 91500548957 is 75984500519.

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 91500548957 - 2¹⁶ = 91500483421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91500548899 and 91500548908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91500548357) 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, 661907 + ... + 788112.

It is an arithmetic number, because the mean of its divisors is an integer number (22875515520).

Almost surely, 2^91500548957 is an apocalyptic number.

It is an amenable number.

91500548957 is a deficient number, since it is larger than the sum of its proper divisors (1513123).

91500548957 is a wasteful number, since it uses less digits than its factorization.

91500548957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1513122.

The product of its (nonzero) digits is 2268000, while the sum is 53.

The spelling of 91500548957 in words is "ninety-one billion, five hundred million, five hundred forty-eight thousand, nine hundred fifty-seven".