91158101776 has 135 divisors (see below), whose sum is σ = 211391615253. Its totient is φ = 37969962240.

The previous prime is 91158101773. The next prime is 91158101819. The reversal of 91158101776 is 67710185119.

The square root of 91158101776 is 301924.

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

It can be written as a sum of positive squares in only one way, i.e., 4392508176 + 86765593600 = 66276^2 + 294560^2 .

It is not an unprimeable number, because it can be changed into a prime (91158101773) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 346608621 + ... + 346608883.

Almost surely, 2^91158101776 is an apocalyptic number.

91158101776 is the 301924-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91158101776

91158101776 is an abundant number, since it is smaller than the sum of its proper divisors (120233513477).

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

91158101776 is an equidigital number, since it uses as much as digits as its factorization.

91158101776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630 (or 313 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 46.

The spelling of 91158101776 in words is "ninety-one billion, one hundred fifty-eight million, one hundred one thousand, seven hundred seventy-six".