91292911551 has 24 divisors (see below), whose sum is σ = 133498624896. Its totient is φ = 60109598160.

The previous prime is 91292911477. The next prime is 91292911553. The reversal of 91292911551 is 15511929219.

91292911551 is a `hidden beast` number, since 9 + 1 + 2 + 9 + 2 + 91 + 1 + 551 = 666.

It is not a de Polignac number, because 91292911551 - 2¹¹ = 91292909503 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91292911497 and 91292911506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91292911553) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2569216 + ... + 2604506.

It is an arithmetic number, because the mean of its divisors is an integer number (5562442704).

Almost surely, 2^91292911551 is an apocalyptic number.

91292911551 is a deficient number, since it is larger than the sum of its proper divisors (42205713345).

91292911551 is a wasteful number, since it uses less digits than its factorization.

91292911551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38843 (or 38840 counting only the distinct ones).

The product of its digits is 72900, while the sum is 45.

The spelling of 91292911551 in words is "ninety-one billion, two hundred ninety-two million, nine hundred eleven thousand, five hundred fifty-one".