91167620793 has 16 divisors (see below), whose sum is σ = 121841771136. Its totient is φ = 60636072960.

The previous prime is 91167620779. The next prime is 91167620801. The reversal of 91167620793 is 39702676119.

It is not a de Polignac number, because 91167620793 - 2¹⁸ = 91167358649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91167628793) 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, 2984628 + ... + 3015018.

It is an arithmetic number, because the mean of its divisors is an integer number (7615110696).

Almost surely, 2^91167620793 is an apocalyptic number.

It is an amenable number.

91167620793 is a deficient number, since it is larger than the sum of its proper divisors (30674150343).

91167620793 is a wasteful number, since it uses less digits than its factorization.

91167620793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32704.

The product of its (nonzero) digits is 857304, while the sum is 51.

The spelling of 91167620793 in words is "ninety-one billion, one hundred sixty-seven million, six hundred twenty thousand, seven hundred ninety-three".