91519464521 has 8 divisors (see below), whose sum is σ = 100028865024. Its totient is φ = 83357386560.

The previous prime is 91519464511. The next prime is 91519464527. The reversal of 91519464521 is 12546491519.

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

It is a de Polignac number, because none of the positive numbers 2^k-91519464521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91519464527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86830085 + ... + 86831138.

It is an arithmetic number, because the mean of its divisors is an integer number (12503608128).

Almost surely, 2^91519464521 is an apocalyptic number.

It is an amenable number.

91519464521 is a deficient number, since it is larger than the sum of its proper divisors (8509400503).

91519464521 is a wasteful number, since it uses less digits than its factorization.

91519464521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173661271.

The product of its digits is 388800, while the sum is 47.

The spelling of 91519464521 in words is "ninety-one billion, five hundred nineteen million, four hundred sixty-four thousand, five hundred twenty-one".