91715241251 has 8 divisors (see below), whose sum is σ = 92350359024. Its totient is φ = 91082280960.

The previous prime is 91715241173. The next prime is 91715241263. The reversal of 91715241251 is 15214251719.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91715241251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91715291251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 454010 + ... + 624143.

It is an arithmetic number, because the mean of its divisors is an integer number (11543794878).

Almost surely, 2^91715241251 is an apocalyptic number.

91715241251 is a deficient number, since it is larger than the sum of its proper divisors (635117773).

91715241251 is a wasteful number, since it uses less digits than its factorization.

91715241251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1078741.

The product of its digits is 25200, while the sum is 38.

The spelling of 91715241251 in words is "ninety-one billion, seven hundred fifteen million, two hundred forty-one thousand, two hundred fifty-one".