90491512786 has 16 divisors (see below), whose sum is σ = 138204561600. Its totient is φ = 44425177488.

The previous prime is 90491512753. The next prime is 90491512799. The reversal of 90491512786 is 68721519409.

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, 364710 + ... + 560353.

It is an arithmetic number, because the mean of its divisors is an integer number (8637785100).

Almost surely, 2^90491512786 is an apocalyptic number.

90491512786 is a deficient number, since it is larger than the sum of its proper divisors (47713048814).

90491512786 is a wasteful number, since it uses less digits than its factorization.

90491512786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 925953.

The product of its (nonzero) digits is 1088640, while the sum is 52.

The spelling of 90491512786 in words is "ninety billion, four hundred ninety-one million, five hundred twelve thousand, seven hundred eighty-six".