91616393124 has 81 divisors (see below), whose sum is σ = 235729651521. Its totient is φ = 30001839840.

The previous prime is 91616393119. The next prime is 91616393137. The reversal of 91616393124 is 42139361619.

The square root of 91616393124 is 302682.

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

91616393124 is a `hidden beast` number, since 9 + 1 + 6 + 1 + 639 + 3 + 1 + 2 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2979194724 + 88637198400 = 54582^2 + 297720^2 .

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 91616393124.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 110781199 + ... + 110782025.

Almost surely, 2^91616393124 is an apocalyptic number.

91616393124 is the 302682-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91616393124

91616393124 is an abundant number, since it is smaller than the sum of its proper divisors (144113258397).

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

91616393124 is an equidigital number, since it uses as much as digits as its factorization.

91616393124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1786 (or 893 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The spelling of 91616393124 in words is "ninety-one billion, six hundred sixteen million, three hundred ninety-three thousand, one hundred twenty-four".