91895936478 has 16 divisors (see below), whose sum is σ = 184601531520. Its totient is φ = 30497035736.

The previous prime is 91895936467. The next prime is 91895936507. The reversal of 91895936478 is 87463959819.

It is a super-2 number, since 2×91895936478² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

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, 33734298 + ... + 33737021.

It is an arithmetic number, because the mean of its divisors is an integer number (11537595720).

Almost surely, 2^91895936478 is an apocalyptic number.

91895936478 is an abundant number, since it is smaller than the sum of its proper divisors (92705595042).

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

91895936478 is a wasteful number, since it uses less digits than its factorization.

91895936478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67471551.

The product of its digits is 117573120, while the sum is 69.

The spelling of 91895936478 in words is "ninety-one billion, eight hundred ninety-five million, nine hundred thirty-six thousand, four hundred seventy-eight".