90810918452 has 12 divisors (see below), whose sum is σ = 158921744100. Its totient is φ = 45404705856.

The previous prime is 90810918397. The next prime is 90810918479. The reversal of 90810918452 is 25481901809.

It can be written as a sum of positive squares in 2 ways, for example, as 59071358116 + 31739560336 = 243046^2 + 178156^2 .

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 90810918397 and 90810918406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150674 + ... + 452022.

It is an arithmetic number, because the mean of its divisors is an integer number (13243478675).

Almost surely, 2^90810918452 is an apocalyptic number.

It is a pronic number, being equal to 301348×301349.

It is an amenable number.

90810918452 is a deficient number, since it is larger than the sum of its proper divisors (68110825648).

90810918452 is a wasteful number, since it uses less digits than its factorization.

90810918452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376690 (or 376688 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 47.

The spelling of 90810918452 in words is "ninety billion, eight hundred ten million, nine hundred eighteen thousand, four hundred fifty-two".