90913945642 has 48 divisors (see below), whose sum is σ = 151583201280. Its totient is φ = 40651595712.

The previous prime is 90913945607. The next prime is 90913945663. The reversal of 90913945642 is 24654931909.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 90913945642.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8501623 + ... + 8512309.

It is an arithmetic number, because the mean of its divisors is an integer number (3157983360).

Almost surely, 2^90913945642 is an apocalyptic number.

90913945642 is a deficient number, since it is larger than the sum of its proper divisors (60669255638).

90913945642 is a wasteful number, since it uses less digits than its factorization.

90913945642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11015 (or 10978 counting only the distinct ones).

The product of its (nonzero) digits is 2099520, while the sum is 52.

The spelling of 90913945642 in words is "ninety billion, nine hundred thirteen million, nine hundred forty-five thousand, six hundred forty-two".