25555868836380 has 576 divisors, whose sum is σ = 85983614615808. Its totient is φ = 6116131307520.

The previous prime is 25555868836339. The next prime is 25555868836409. The reversal of 25555868836380 is 8363886855552.

25555868836380 is a `hidden beast` number, since 2 + 5 + 5 + 5 + 586 + 8 + 8 + 3 + 6 + 38 + 0 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 25555868836299 and 25555868836308.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 7278798825 + ... + 7278802335.

It is an arithmetic number, because the mean of its divisors is an integer number (149277108708).

Almost surely, 2^{25555868836380} is an apocalyptic number.

25555868836380 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 25555868836380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42991807307904).

25555868836380 is an abundant number, since it is smaller than the sum of its proper divisors (60427745779428).

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

25555868836380 is a wasteful number, since it uses less digits than its factorization.

25555868836380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4846 (or 4841 counting only the distinct ones).

The product of its (nonzero) digits is 1658880000, while the sum is 72.

The spelling of 25555868836380 in words is "twenty-five trillion, five hundred fifty-five billion, eight hundred sixty-eight million, eight hundred thirty-six thousand, three hundred eighty".