91919101009079 has 8 divisors (see below), whose sum is σ = 91931468233968. Its totient is φ = 91906734628800.

The previous prime is 91919101009067. The next prime is 91919101009093. The reversal of 91919101009079 is 97090010191919.

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

It is a cyclic number.

It is not a de Polignac number, because 91919101009079 - 2⁴⁰ = 90819589381303 is a prime.

It is a super-2 number, since 2×91919101009079² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91919101009049) 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, 234710729 + ... + 235102029.

It is an arithmetic number, because the mean of its divisors is an integer number (11491433529246).

Almost surely, 2^{91919101009079} is an apocalyptic number.

91919101009079 is a deficient number, since it is larger than the sum of its proper divisors (12367224889).

91919101009079 is a wasteful number, since it uses less digits than its factorization.

91919101009079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422305.

The product of its (nonzero) digits is 413343, while the sum is 56.

The spelling of 91919101009079 in words is "ninety-one trillion, nine hundred nineteen billion, one hundred one million, nine thousand, seventy-nine".