2525201649 has 10 divisors (see below), whose sum is σ = 3772214930. Its totient is φ = 1683467712.

The previous prime is 2525201647. The next prime is 2525201677. The reversal of 2525201649 is 9461025252.

2525201649 is a `hidden beast` number, since 2 + 5 + 2 + 5 + 2 + 0 + 1 + 649 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1602561024 + 922640625 = 40032^2 + 30375^2 .

It is not a de Polignac number, because 2525201649 - 2¹ = 2525201647 is a prime.

It is a super-2 number, since 2×2525201649² = 12753286736224638402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2525201647) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 15587584 + ... + 15587745.

It is an arithmetic number, because the mean of its divisors is an integer number (377221493).

Almost surely, 2^2525201649 is an apocalyptic number.

It is an amenable number.

2525201649 is a deficient number, since it is larger than the sum of its proper divisors (1247013281).

2525201649 is an equidigital number, since it uses as much as digits as its factorization.

2525201649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31175341 (or 31175332 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 2525201649 is about 50251.3845480898. The cubic root of 2525201649 is about 1361.7540891978.

The spelling of 2525201649 in words is "two billion, five hundred twenty-five million, two hundred one thousand, six hundred forty-nine".