91715872503 has 16 divisors (see below), whose sum is σ = 122559544800. Its totient is φ = 61008130560.

The previous prime is 91715872499. The next prime is 91715872543. The reversal of 91715872503 is 30527851719.

It is not a de Polignac number, because 91715872503 - 2² = 91715872499 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91715872543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6884613 + ... + 6897921.

It is an arithmetic number, because the mean of its divisors is an integer number (7659971550).

Almost surely, 2^91715872503 is an apocalyptic number.

91715872503 is a deficient number, since it is larger than the sum of its proper divisors (30843672297).

91715872503 is a wasteful number, since it uses less digits than its factorization.

91715872503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18242.

The product of its (nonzero) digits is 529200, while the sum is 48.

The spelling of 91715872503 in words is "ninety-one billion, seven hundred fifteen million, eight hundred seventy-two thousand, five hundred three".