91418546025 has 45 divisors (see below), whose sum is σ = 169363955431. Its totient is φ = 48749301360.

The previous prime is 91418545991. The next prime is 91418546041. The reversal of 91418546025 is 52064581419.

The square root of 91418546025 is 302355.

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

91418546025 is a `hidden beast` number, since 9 + 1 + 4 + 185 + 460 + 2 + 5 = 666.

It can be written as a sum of positive squares in only one way, i.e., 32910676569 + 58507869456 = 181413^2 + 241884^2 .

It is a tau number, because it is divible by the number of its divisors (45).

It is not a de Polignac number, because 91418546025 - 2¹⁵ = 91418513257 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 44 ways as a sum of consecutive naturals, for example, 13602616 + ... + 13609334.

Almost surely, 2^91418546025 is an apocalyptic number.

91418546025 is the 302355-th square number.

91418546025 is the 151178-th centered octagonal number.

It is an amenable number.

91418546025 is a deficient number, since it is larger than the sum of its proper divisors (77945409406).

91418546025 is an frugal number, since it uses more digits than its factorization.

91418546025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13460 (or 6727 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The spelling of 91418546025 in words is "ninety-one billion, four hundred eighteen million, five hundred forty-six thousand, twenty-five".