91405498394 has 16 divisors (see below), whose sum is σ = 156816734400. Its totient is φ = 39143386464.

The previous prime is 91405498381. The next prime is 91405498423. The reversal of 91405498394 is 49389450419.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2514524 + ... + 2550615.

It is an arithmetic number, because the mean of its divisors is an integer number (9801045900).

Almost surely, 2^91405498394 is an apocalyptic number.

91405498394 is a deficient number, since it is larger than the sum of its proper divisors (65411236006).

91405498394 is a wasteful number, since it uses less digits than its factorization.

91405498394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5066437.

The product of its (nonzero) digits is 5598720, while the sum is 56.

The spelling of 91405498394 in words is "ninety-one billion, four hundred five million, four hundred ninety-eight thousand, three hundred ninety-four".