91220043213404 has 96 divisors (see below), whose sum is σ = 183482168163840. Its totient is φ = 38871520800768.

The previous prime is 91220043213389. The next prime is 91220043213539. The reversal of 91220043213404 is 40431234002219.

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, 21298163447 + ... + 21298167729.

It is an arithmetic number, because the mean of its divisors is an integer number (1911272585040).

Almost surely, 2^{91220043213404} is an apocalyptic number.

It is an amenable number.

91220043213404 is an abundant number, since it is smaller than the sum of its proper divisors (92262124950436).

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

91220043213404 is a wasteful number, since it uses less digits than its factorization.

91220043213404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8379 (or 8377 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 35.

The spelling of 91220043213404 in words is "ninety-one trillion, two hundred twenty billion, forty-three million, two hundred thirteen thousand, four hundred four".