91604505404 has 6 divisors (see below), whose sum is σ = 160307884464. Its totient is φ = 45802252700.

The previous prime is 91604505403. The next prime is 91604505427. The reversal of 91604505404 is 40450540619.

It is a super-2 number, since 2×91604505404² (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 (91604505403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11450563172 + ... + 11450563179.

It is an arithmetic number, because the mean of its divisors is an integer number (26717980744).

Almost surely, 2^91604505404 is an apocalyptic number.

It is an amenable number.

91604505404 is a deficient number, since it is larger than the sum of its proper divisors (68703379060).

91604505404 is a wasteful number, since it uses less digits than its factorization.

91604505404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22901126355 (or 22901126353 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 38.

The spelling of 91604505404 in words is "ninety-one billion, six hundred four million, five hundred five thousand, four hundred four".