90901709402 has 32 divisors (see below), whose sum is σ = 157868974080. Its totient is φ = 38451198960.

The previous prime is 90901709333. The next prime is 90901709413. The reversal of 90901709402 is 20490710909.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 90901709402.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 293999 + ... + 517917.

It is an arithmetic number, because the mean of its divisors is an integer number (4933405440).

Almost surely, 2^90901709402 is an apocalyptic number.

90901709402 is a deficient number, since it is larger than the sum of its proper divisors (66967264678).

90901709402 is a wasteful number, since it uses less digits than its factorization.

90901709402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224306.

The product of its (nonzero) digits is 40824, while the sum is 41.

The spelling of 90901709402 in words is "ninety billion, nine hundred one million, seven hundred nine thousand, four hundred two".