3900156725 has 12 divisors (see below), whose sum is σ = 4837177380. Its totient is φ = 3119491200.

The previous prime is 3900156721. The next prime is 3900156749. The reversal of 3900156725 is 5276510093.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 774675889 + 3125480836 = 27833^2 + 55906^2 .

It is not a de Polignac number, because 3900156725 - 2² = 3900156721 is a prime.

It is a super-2 number, since 2×3900156725² = 30422444959125451250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3900156721) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 139415 + ... + 165035.

It is an arithmetic number, because the mean of its divisors is an integer number (403098115).

Almost surely, 2^3900156725 is an apocalyptic number.

It is an amenable number.

3900156725 is a deficient number, since it is larger than the sum of its proper divisors (937020655).

3900156725 is a wasteful number, since it uses less digits than its factorization.

3900156725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31720 (or 31715 counting only the distinct ones).

The product of its (nonzero) digits is 56700, while the sum is 38.

The square root of 3900156725 is about 62451.2347756231. The cubic root of 3900156725 is about 1574.0820013659.

The spelling of 3900156725 in words is "three billion, nine hundred million, one hundred fifty-six thousand, seven hundred twenty-five".