91474138794 has 32 divisors (see below), whose sum is σ = 183515397120. Its totient is φ = 30396929472.

The previous prime is 91474138733. The next prime is 91474138799. The reversal of 91474138794 is 49783147419.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (91474138799) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6436104 + ... + 6450300.

It is an arithmetic number, because the mean of its divisors is an integer number (5734856160).

Almost surely, 2^91474138794 is an apocalyptic number.

91474138794 is an abundant number, since it is smaller than the sum of its proper divisors (92041258326).

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

91474138794 is a wasteful number, since it uses less digits than its factorization.

91474138794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17454.

The product of its digits is 6096384, while the sum is 57.

The spelling of 91474138794 in words is "ninety-one billion, four hundred seventy-four million, one hundred thirty-eight thousand, seven hundred ninety-four".