2525381660 has 24 divisors (see below), whose sum is σ = 5304442416. Its totient is φ = 1009935360.

The previous prime is 2525381659. The next prime is 2525381689. The reversal of 2525381660 is 661835252.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108455 + ... + 129665.

It is an arithmetic number, because the mean of its divisors is an integer number (221018434).

Almost surely, 2^2525381660 is an apocalyptic number.

2525381660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2525381660 is an abundant number, since it is smaller than the sum of its proper divisors (2779060756).

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

2525381660 is a wasteful number, since it uses less digits than its factorization.

2525381660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27173 (or 27171 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 38.

The square root of 2525381660 is about 50253.1756210491. The cubic root of 2525381660 is about 1361.7864463353.

The spelling of 2525381660 in words is "two billion, five hundred twenty-five million, three hundred eighty-one thousand, six hundred sixty".