990158858952 has 32 divisors (see below), whose sum is σ = 2535772690080. Its totient is φ = 322002880640.

The previous prime is 990158858951. The next prime is 990158858957. The reversal of 990158858952 is 259858851099.

It is a super-2 number, since 2×990158858952² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (990158858951) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 503128518 + ... + 503130485.

It is an arithmetic number, because the mean of its divisors is an integer number (79242896565).

Almost surely, 2^990158858952 is an apocalyptic number.

It is an amenable number.

990158858952 is an abundant number, since it is smaller than the sum of its proper divisors (1545613831128).

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

990158858952 is a wasteful number, since it uses less digits than its factorization.

990158858952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1006259053 (or 1006259049 counting only the distinct ones).

The product of its (nonzero) digits is 93312000, while the sum is 69.

The spelling of 990158858952 in words is "nine hundred ninety billion, one hundred fifty-eight million, eight hundred fifty-eight thousand, nine hundred fifty-two".