91944862740 has 36 divisors (see below), whose sum is σ = 278899417524. Its totient is φ = 24518630016.

The previous prime is 91944862699. The next prime is 91944862741. The reversal of 91944862740 is 4726844919.

91944862740 is a `hidden beast` number, since 9 + 1 + 9 + 4 + 4 + 8 + 627 + 4 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 61708521744 + 30236340996 = 248412^2 + 173886^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91944862741) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 255402217 + ... + 255402576.

Almost surely, 2^91944862740 is an apocalyptic number.

91944862740 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

91944862740 is an abundant number, since it is smaller than the sum of its proper divisors (186954554784).

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

91944862740 is a wasteful number, since it uses less digits than its factorization.

91944862740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510804808 (or 510804803 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The spelling of 91944862740 in words is "ninety-one billion, nine hundred forty-four million, eight hundred sixty-two thousand, seven hundred forty".