91163268477 has 32 divisors (see below), whose sum is σ = 139590598400. Its totient is φ = 58756186944.

The previous prime is 91163268463. The next prime is 91163268499. The reversal of 91163268477 is 77486236119.

91163268477 is a `hidden beast` number, since 9 + 1 + 163 + 2 + 6 + 8 + 477 = 666.

It is not a de Polignac number, because 91163268477 - 2¹¹ = 91163266429 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91163268377) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 133777 + ... + 447462.

It is an arithmetic number, because the mean of its divisors is an integer number (4362206200).

Almost surely, 2^91163268477 is an apocalyptic number.

It is an amenable number.

91163268477 is a deficient number, since it is larger than the sum of its proper divisors (48427329923).

91163268477 is a wasteful number, since it uses less digits than its factorization.

91163268477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581442 (or 581436 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 54.

The spelling of 91163268477 in words is "ninety-one billion, one hundred sixty-three million, two hundred sixty-eight thousand, four hundred seventy-seven".