91314642993 has 16 divisors (see below), whose sum is σ = 139467490176. Its totient is φ = 52059283200.

The previous prime is 91314642971. The next prime is 91314643001. The reversal of 91314642993 is 39924641319.

It is not a de Polignac number, because 91314642993 - 2⁶ = 91314642929 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (91314642193) 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, 5012058 + ... + 5030243.

It is an arithmetic number, because the mean of its divisors is an integer number (8716718136).

Almost surely, 2^91314642993 is an apocalyptic number.

It is an amenable number.

91314642993 is a deficient number, since it is larger than the sum of its proper divisors (48152847183).

91314642993 is a wasteful number, since it uses less digits than its factorization.

91314642993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10042744.

The product of its digits is 1259712, while the sum is 51.

The spelling of 91314642993 in words is "ninety-one billion, three hundred fourteen million, six hundred forty-two thousand, nine hundred ninety-three".