91912926879 has 32 divisors (see below), whose sum is σ = 137565849600. Its totient is φ = 60646384800.

The previous prime is 91912926877. The next prime is 91912926907. The reversal of 91912926879 is 97862921919.

It is not a de Polignac number, because 91912926879 - 2¹ = 91912926877 is a prime.

It is a super-2 number, since 2×91912926879² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91912926877) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11119302 + ... + 11127564.

It is an arithmetic number, because the mean of its divisors is an integer number (4298932800).

Almost surely, 2^91912926879 is an apocalyptic number.

91912926879 is a deficient number, since it is larger than the sum of its proper divisors (45652922721).

91912926879 is a wasteful number, since it uses less digits than its factorization.

91912926879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12452 (or 12446 counting only the distinct ones).

The product of its digits is 8817984, while the sum is 63.

The spelling of 91912926879 in words is "ninety-one billion, nine hundred twelve million, nine hundred twenty-six thousand, eight hundred seventy-nine".