990142977825 has 18 divisors (see below), whose sum is σ = 1773456089574. Its totient is φ = 528076254720.

The previous prime is 990142977793. The next prime is 990142977827. The reversal of 990142977825 is 528779241099.

990142977825 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 155403100944 + 834739876881 = 394212^2 + 913641^2 .

It is not a de Polignac number, because 990142977825 - 2⁵ = 990142977793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (990142977827) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2200317504 + ... + 2200317953.

Almost surely, 2^990142977825 is an apocalyptic number.

It is an amenable number.

990142977825 is a deficient number, since it is larger than the sum of its proper divisors (783313111749).

990142977825 is a wasteful number, since it uses less digits than its factorization.

990142977825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4400635473 (or 4400635465 counting only the distinct ones).

The product of its (nonzero) digits is 22861440, while the sum is 63.

The spelling of 990142977825 in words is "nine hundred ninety billion, one hundred forty-two million, nine hundred seventy-seven thousand, eight hundred twenty-five".