25555411440 has 160 divisors (see below), whose sum is σ = 94795391040. Its totient is φ = 6290555904.

The previous prime is 25555411439. The next prime is 25555411463. The reversal of 25555411440 is 4411455552.

25555411440 is a `hidden beast` number, since 2 + 55 + 554 + 1 + 14 + 40 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 25555411395 and 25555411404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 426967 + ... + 483126.

It is an arithmetic number, because the mean of its divisors is an integer number (592471194).

Almost surely, 2^25555411440 is an apocalyptic number.

25555411440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25555411440 is an abundant number, since it is smaller than the sum of its proper divisors (69239979600).

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

25555411440 is a wasteful number, since it uses less digits than its factorization.

25555411440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910128 (or 910116 counting only the distinct ones).

The product of its (nonzero) digits is 80000, while the sum is 36.

Adding to 25555411440 its reverse (4411455552), we get a palindrome (29966866992).

The spelling of 25555411440 in words is "twenty-five billion, five hundred fifty-five million, four hundred eleven thousand, four hundred forty".