25651782140 has 24 divisors (see below), whose sum is σ = 54672756432. Its totient is φ = 10107567360.

The previous prime is 25651782127. The next prime is 25651782151. The reversal of 25651782140 is 4128715652.

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, 9570221 + ... + 9572900.

It is an arithmetic number, because the mean of its divisors is an integer number (2278031518).

Almost surely, 2^25651782140 is an apocalyptic number.

25651782140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25651782140 is an abundant number, since it is smaller than the sum of its proper divisors (29020974292).

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

25651782140 is a wasteful number, since it uses less digits than its factorization.

25651782140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19143197 (or 19143195 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 41.

The spelling of 25651782140 in words is "twenty-five billion, six hundred fifty-one million, seven hundred eighty-two thousand, one hundred forty".