2500656645 has 16 divisors (see below), whose sum is σ = 4003534080. Its totient is φ = 1332855744.

The previous prime is 2500656643. The next prime is 2500656713. The reversal of 2500656645 is 5466560052.

It is a happy number.

It is not a de Polignac number, because 2500656645 - 2¹ = 2500656643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2500656643) 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, 26365 + ... + 75474.

It is an arithmetic number, because the mean of its divisors is an integer number (250220880).

Almost surely, 2^2500656645 is an apocalyptic number.

It is an amenable number.

2500656645 is a deficient number, since it is larger than the sum of its proper divisors (1502877435).

2500656645 is a wasteful number, since it uses less digits than its factorization.

2500656645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103484.

The product of its (nonzero) digits is 216000, while the sum is 39.

The square root of 2500656645 is about 50006.5660188740. The cubic root of 2500656645 is about 1357.3276251457.

The spelling of 2500656645 in words is "two billion, five hundred million, six hundred fifty-six thousand, six hundred forty-five".