2625909657 has 48 divisors (see below), whose sum is σ = 4189231872. Its totient is φ = 1457944320.

The previous prime is 2625909631. The next prime is 2625909673. The reversal of 2625909657 is 7569095262.

It is not a de Polignac number, because 2625909657 - 2¹⁰ = 2625908633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2625909617) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1765168 + ... + 1766654.

It is an arithmetic number, because the mean of its divisors is an integer number (87275664).

Almost surely, 2^2625909657 is an apocalyptic number.

It is an amenable number.

2625909657 is a deficient number, since it is larger than the sum of its proper divisors (1563322215).

2625909657 is a wasteful number, since it uses less digits than its factorization.

2625909657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1838 (or 1831 counting only the distinct ones).

The product of its (nonzero) digits is 2041200, while the sum is 51.

The square root of 2625909657 is about 51243.6304041780. The cubic root of 2625909657 is about 1379.6214142126.

The spelling of 2625909657 in words is "two billion, six hundred twenty-five million, nine hundred nine thousand, six hundred fifty-seven".