990657338132 has 48 divisors (see below), whose sum is σ = 2167323906048. Its totient is φ = 384918657120.

The previous prime is 990657338131. The next prime is 990657338219. The reversal of 990657338132 is 231833756099.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990657338131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4269008 + ... + 4495079.

It is an arithmetic number, because the mean of its divisors is an integer number (45152581376).

Almost surely, 2^990657338132 is an apocalyptic number.

It is an amenable number.

990657338132 is an abundant number, since it is smaller than the sum of its proper divisors (1176666567916).

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

990657338132 is a wasteful number, since it uses less digits than its factorization.

990657338132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8764476 (or 8764474 counting only the distinct ones).

The product of its (nonzero) digits is 7348320, while the sum is 56.

The spelling of 990657338132 in words is "nine hundred ninety billion, six hundred fifty-seven million, three hundred thirty-eight thousand, one hundred thirty-two".