990459457452 has 18 divisors (see below), whose sum is σ = 2503661406428. Its totient is φ = 330153152472.

The previous prime is 990459457331. The next prime is 990459457483. The reversal of 990459457452 is 254754954099.

990459457452 is a `hidden beast` number, since 9 + 9 + 0 + 4 + 5 + 9 + 4 + 574 + 52 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×990459457452² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 990459457452.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13756381318 + ... + 13756381389.

Almost surely, 2^990459457452 is an apocalyptic number.

It is an amenable number.

990459457452 is an abundant number, since it is smaller than the sum of its proper divisors (1513201948976).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

990459457452 is a wasteful number, since it uses less digits than its factorization.

990459457452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27512762717 (or 27512762712 counting only the distinct ones).

The product of its (nonzero) digits is 81648000, while the sum is 63.

The spelling of 990459457452 in words is "nine hundred ninety billion, four hundred fifty-nine million, four hundred fifty-seven thousand, four hundred fifty-two".