2507655261 has 16 divisors (see below), whose sum is σ = 3566070144. Its totient is φ = 1561941504.

The previous prime is 2507655257. The next prime is 2507655299. The reversal of 2507655261 is 1625567052.

It is not a de Polignac number, because 2507655261 - 2² = 2507655257 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2507655211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 172465 + ... + 186438.

It is an arithmetic number, because the mean of its divisors is an integer number (222879384).

Almost surely, 2^2507655261 is an apocalyptic number.

It is an amenable number.

2507655261 is a deficient number, since it is larger than the sum of its proper divisors (1058414883).

2507655261 is a wasteful number, since it uses less digits than its factorization.

2507655261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359060.

The product of its (nonzero) digits is 126000, while the sum is 39.

The square root of 2507655261 is about 50076.4940965320. The cubic root of 2507655261 is about 1358.5927017363.

The spelling of 2507655261 in words is "two billion, five hundred seven million, six hundred fifty-five thousand, two hundred sixty-one".