2501655870 has 128 divisors (see below), whose sum is σ = 7022039040. Its totient is φ = 558604800.

The previous prime is 2501655869. The next prime is 2501655883. The reversal of 2501655870 is 785561052.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1674844 + ... + 1676336.

It is an arithmetic number, because the mean of its divisors is an integer number (54859680).

Almost surely, 2^2501655870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2501655870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3511019520).

2501655870 is an abundant number, since it is smaller than the sum of its proper divisors (4520383170).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2501655870 is a wasteful number, since it uses less digits than its factorization.

2501655870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1690.

The product of its (nonzero) digits is 84000, while the sum is 39.

The square root of 2501655870 is about 50016.5559590022. Note that the first 3 decimals coincide. The cubic root of 2501655870 is about 1357.5083903446.

The spelling of 2501655870 in words is "two billion, five hundred one million, six hundred fifty-five thousand, eight hundred seventy".