2501655871 has 8 divisors (see below), whose sum is σ = 2939008464. Its totient is φ = 2099291520.

The previous prime is 2501655869. The next prime is 2501655883. The reversal of 2501655871 is 1785561052.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2501655871 - 2¹ = 2501655869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2501655071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8746906 + ... + 8747191.

It is an arithmetic number, because the mean of its divisors is an integer number (367376058).

Almost surely, 2^2501655871 is an apocalyptic number.

2501655871 is a deficient number, since it is larger than the sum of its proper divisors (437352593).

2501655871 is a wasteful number, since it uses less digits than its factorization.

2501655871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17494121.

The product of its (nonzero) digits is 84000, while the sum is 40.

The square root of 2501655871 is about 50016.5559689989. Note that the first 3 decimals coincide. The cubic root of 2501655871 is about 1357.5083905255.

It can be divided in two parts, 250165 and 5871, that added together give a square (256036 = 506²).

The spelling of 2501655871 in words is "two billion, five hundred one million, six hundred fifty-five thousand, eight hundred seventy-one".