91659984516 has 27 divisors (see below), whose sum is σ = 231700663831. Its totient is φ = 30552722664.

The previous prime is 91659984443. The next prime is 91659984593. The reversal of 91659984516 is 61548995619.

The square root of 91659984516 is 302754.

It is a perfect power (a square), and thus also a powerful number.

91659984516 is a `hidden beast` number, since 91 + 6 + 5 + 9 + 98 + 451 + 6 = 666.

It is a super-2 number, since 2×91659984516² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1791295 + ... + 1841753.

Almost surely, 2^91659984516 is an apocalyptic number.

91659984516 is the 302754-th square number.

It is an amenable number.

91659984516 is an abundant number, since it is smaller than the sum of its proper divisors (140040679315).

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

91659984516 is an frugal number, since it uses more digits than its factorization.

91659984516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100928 (or 50464 counting only the distinct ones).

The product of its digits is 20995200, while the sum is 63.

The spelling of 91659984516 in words is "ninety-one billion, six hundred fifty-nine million, nine hundred eighty-four thousand, five hundred sixteen".