91647279593 has 8 divisors (see below), whose sum is σ = 93739282560. Its totient is φ = 89561195920.

The previous prime is 91647279583. The next prime is 91647279673. The reversal of 91647279593 is 39597274619.

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

It is not a de Polignac number, because 91647279593 - 2¹² = 91647275497 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (91647279583) 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, 1448498 + ... + 1510443.

It is an arithmetic number, because the mean of its divisors is an integer number (11717410320).

Almost surely, 2^91647279593 is an apocalyptic number.

It is an amenable number.

91647279593 is a deficient number, since it is larger than the sum of its proper divisors (2092002967).

91647279593 is a wasteful number, since it uses less digits than its factorization.

91647279593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2959647.

The product of its digits is 25719120, while the sum is 62.

The spelling of 91647279593 in words is "ninety-one billion, six hundred forty-seven million, two hundred seventy-nine thousand, five hundred ninety-three".