2125902690 has 48 divisors (see below), whose sum is σ = 5547083256. Its totient is φ = 564883200.

The previous prime is 2125902689. The next prime is 2125902721. The reversal of 2125902690 is 962095212.

It is a happy number.

2125902690 is a `hidden beast` number, since 2 + 1 + 2 + 590 + 2 + 69 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1252522881 + 873379809 = 35391^2 + 29553^2 .

It is a super-2 number, since 2×2125902690² = 9038924494698472200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16741 + ... + 67320.

Almost surely, 2^2125902690 is an apocalyptic number.

2125902690 is an abundant number, since it is smaller than the sum of its proper divisors (3421180566).

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

2125902690 is a wasteful number, since it uses less digits than its factorization.

2125902690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84355 (or 84352 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 2125902690 is about 46107.5122946359. The cubic root of 2125902690 is about 1285.8228142779.

The spelling of 2125902690 in words is "two billion, one hundred twenty-five million, nine hundred two thousand, six hundred ninety".