25549655040 has 880 divisors, whose sum is σ = 112850160192. Its totient is φ = 5382733824.

The previous prime is 25549654993. The next prime is 25549655057. The reversal of 25549655040 is 4055694552.

25549655040 is a `hidden beast` number, since 2 + 5 + 5 + 4 + 96 + 550 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 37739182 + ... + 37739858.

Almost surely, 2^25549655040 is an apocalyptic number.

25549655040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25549655040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56425080096).

25549655040 is an abundant number, since it is smaller than the sum of its proper divisors (87300505152).

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

25549655040 is a wasteful number, since it uses less digits than its factorization.

25549655040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 734 (or 707 counting only the distinct ones).

The product of its (nonzero) digits is 1080000, while the sum is 45.

The spelling of 25549655040 in words is "twenty-five billion, five hundred forty-nine million, six hundred fifty-five thousand, forty".