91249368201 has 6 divisors (see below), whose sum is σ = 131804642970. Its totient is φ = 60832912128.

The previous prime is 91249368163. The next prime is 91249368209. The reversal of 91249368201 is 10286394219.

It can be written as a sum of positive squares in only one way, i.e., 49406620176 + 41842748025 = 222276^2 + 204555^2 .

It is not a de Polignac number, because 91249368201 - 2⁷ = 91249368073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91249368209) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5069409336 + ... + 5069409353.

It is an arithmetic number, because the mean of its divisors is an integer number (21967440495).

Almost surely, 2^91249368201 is an apocalyptic number.

It is an amenable number.

91249368201 is a deficient number, since it is larger than the sum of its proper divisors (40555274769).

91249368201 is a wasteful number, since it uses less digits than its factorization.

91249368201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10138818695 (or 10138818692 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The spelling of 91249368201 in words is "ninety-one billion, two hundred forty-nine million, three hundred sixty-eight thousand, two hundred one".