91869468691 has 32 divisors (see below), whose sum is σ = 123788560896. Its totient is φ = 65844576000.

The previous prime is 91869468689. The next prime is 91869468697. The reversal of 91869468691 is 19686496819.

It is not a de Polignac number, because 91869468691 - 2¹ = 91869468689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91869468697) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 117976 + ... + 444586.

It is an arithmetic number, because the mean of its divisors is an integer number (3868392528).

Almost surely, 2^91869468691 is an apocalyptic number.

91869468691 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

91869468691 is a deficient number, since it is larger than the sum of its proper divisors (31919092205).

91869468691 is a wasteful number, since it uses less digits than its factorization.

91869468691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326923.

The product of its digits is 40310784, while the sum is 67.

The spelling of 91869468691 in words is "ninety-one billion, eight hundred sixty-nine million, four hundred sixty-eight thousand, six hundred ninety-one".