91515464 has 8 divisors (see below), whose sum is σ = 171591510. Its totient is φ = 45757728.

The previous prime is 91515461. The next prime is 91515497. The reversal of 91515464 is 46451519.

It can be written as a sum of positive squares in only one way, i.e., 85414564 + 6100900 = 9242^2 + 2470^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×91515464² = 16750160302270592, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (91515461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5719709 + ... + 5719724.

Almost surely, 2^91515464 is an apocalyptic number.

It is an amenable number.

91515464 is a deficient number, since it is larger than the sum of its proper divisors (80076046).

91515464 is a wasteful number, since it uses less digits than its factorization.

91515464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11439439 (or 11439435 counting only the distinct ones).

The product of its digits is 21600, while the sum is 35.

The square root of 91515464 is about 9566.3715169337. The cubic root of 91515464 is about 450.6418232437.

The spelling of 91515464 in words is "ninety-one million, five hundred fifteen thousand, four hundred sixty-four".