2505001655 has 24 divisors (see below), whose sum is σ = 3360055680. Its totient is φ = 1790156160.

The previous prime is 2505001651. The next prime is 2505001657. The reversal of 2505001655 is 5561005052.

It is not a de Polignac number, because 2505001655 - 2² = 2505001651 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2505001651) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21620 + ... + 74009.

It is an arithmetic number, because the mean of its divisors is an integer number (140002320).

Almost surely, 2^2505001655 is an apocalyptic number.

2505001655 is a deficient number, since it is larger than the sum of its proper divisors (855054025).

2505001655 is a wasteful number, since it uses less digits than its factorization.

2505001655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95691 (or 95678 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 29.

The square root of 2505001655 is about 50049.9915584408. The cubic root of 2505001655 is about 1358.1133107271.

The spelling of 2505001655 in words is "two billion, five hundred five million, one thousand, six hundred fifty-five".