91412499025 has 27 divisors (see below), whose sum is σ = 120445315219. Its totient is φ = 68808884480.

The previous prime is 91412499023. The next prime is 91412499043. The reversal of 91412499025 is 52099421419.

It is a happy number.

The square root of 91412499025 is 302345.

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

It can be written as a sum of positive squares in 13 ways, for example, as 69539272209 + 21873226816 = 263703^2 + 147896^2 .

It is not a de Polignac number, because 91412499025 - 2¹ = 91412499023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91412499023) 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, 25697547 + ... + 25701103.

Almost surely, 2^91412499025 is an apocalyptic number.

91412499025 is the 302345-th square number.

91412499025 is the 151173-rd centered octagonal number.

It is an amenable number.

91412499025 is a deficient number, since it is larger than the sum of its proper divisors (29032816194).

91412499025 is an frugal number, since it uses more digits than its factorization.

91412499025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7158 (or 3579 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 46.

The spelling of 91412499025 in words is "ninety-one billion, four hundred twelve million, four hundred ninety-nine thousand, twenty-five".