91919101009080 has 128 divisors (see below), whose sum is σ = 280442481984000. Its totient is φ = 24097278374400.

The previous prime is 91919101009067. The next prime is 91919101009093. The reversal of 91919101009080 is 8090010191919.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (91919101009067) and next prime (91919101009093).

It is a super-2 number, since 2×91919101009080² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12483006 + ... + 18429965.

It is an arithmetic number, because the mean of its divisors is an integer number (2190956890500).

Almost surely, 2^{91919101009080} is an apocalyptic number.

It is an amenable number.

91919101009080 is an abundant number, since it is smaller than the sum of its proper divisors (188523380974920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91919101009080 is a wasteful number, since it uses less digits than its factorization.

91919101009080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30913405 (or 30913401 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 48.

The spelling of 91919101009080 in words is "ninety-one trillion, nine hundred nineteen billion, one hundred one million, nine thousand, eighty".