91864140995 has 8 divisors (see below), whose sum is σ = 120258511920. Its totient is φ = 66810284320.

The previous prime is 91864140943. The next prime is 91864141013. The reversal of 91864140995 is 59904146819.

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

It is not a de Polignac number, because 91864140995 - 2¹² = 91864136899 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91864140995.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 835128500 + ... + 835128609.

It is an arithmetic number, because the mean of its divisors is an integer number (15032313990).

Almost surely, 2^91864140995 is an apocalyptic number.

91864140995 is a deficient number, since it is larger than the sum of its proper divisors (28394370925).

91864140995 is a wasteful number, since it uses less digits than its factorization.

91864140995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1670257125.

The product of its (nonzero) digits is 2799360, while the sum is 56.

The spelling of 91864140995 in words is "ninety-one billion, eight hundred sixty-four million, one hundred forty thousand, nine hundred ninety-five".