2500950861 has 12 divisors (see below), whose sum is σ = 3625344060. Its totient is φ = 1661365440.

The previous prime is 2500950857. The next prime is 2500950863. The reversal of 2500950861 is 1680590052.

It is a happy number.

2500950861 is a `hidden beast` number, since 2 + 500 + 95 + 0 + 8 + 61 = 666.

2500950861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 686702025 + 1814248836 = 26205^2 + 42594^2 .

It is not a de Polignac number, because 2500950861 - 2² = 2500950857 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2500950863) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 491926 + ... + 496983.

It is an arithmetic number, because the mean of its divisors is an integer number (302112005).

Almost surely, 2^2500950861 is an apocalyptic number.

It is an amenable number.

2500950861 is a deficient number, since it is larger than the sum of its proper divisors (1124393199).

2500950861 is a wasteful number, since it uses less digits than its factorization.

2500950861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 989196 (or 989193 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 2500950861 is about 50009.5077060353. The cubic root of 2500950861 is about 1357.3808554102.

The spelling of 2500950861 in words is "two billion, five hundred million, nine hundred fifty thousand, eight hundred sixty-one".