2507507507561 has 16 divisors (see below), whose sum is σ = 2885030937600. Its totient is φ = 2134847903760.

The previous prime is 2507507507471. The next prime is 2507507507587. The reversal of 2507507507561 is 1657057057052.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2507507507561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2507507506561) 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, 715595 + ... + 2350976.

It is an arithmetic number, because the mean of its divisors is an integer number (180314433600).

Almost surely, 2^{2507507507561} is an apocalyptic number.

It is an amenable number.

2507507507561 is a deficient number, since it is larger than the sum of its proper divisors (377523430039).

2507507507561 is a wasteful number, since it uses less digits than its factorization.

2507507507561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3067364.

The product of its (nonzero) digits is 2572500, while the sum is 50.

The spelling of 2507507507561 in words is "two trillion, five hundred seven billion, five hundred seven million, five hundred seven thousand, five hundred sixty-one".