91490895784 has 16 divisors (see below), whose sum is σ = 171549259200. Its totient is φ = 45744426672.

The previous prime is 91490895779. The next prime is 91490895787. The reversal of 91490895784 is 48759809419.

It is a happy number.

It is a super-2 number, since 2×91490895784² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (91490895787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 364897 + ... + 562255.

It is an arithmetic number, because the mean of its divisors is an integer number (10721828700).

Almost surely, 2^91490895784 is an apocalyptic number.

It is an amenable number.

91490895784 is a deficient number, since it is larger than the sum of its proper divisors (80058363416).

91490895784 is a wasteful number, since it uses less digits than its factorization.

91490895784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255312 (or 255308 counting only the distinct ones).

The product of its (nonzero) digits is 26127360, while the sum is 64.

The spelling of 91490895784 in words is "ninety-one billion, four hundred ninety million, eight hundred ninety-five thousand, seven hundred eighty-four".