25555144155552 has 384 divisors, whose sum is σ = 86127385639680. Its totient is φ = 7285702164480.

The previous prime is 25555144155551. The next prime is 25555144155587.

25555144155552 is a `hidden beast` number, since 2 + 5 + 55 + 51 + 441 + 5 + 55 + 52 = 666.

25555144155552 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×25555144155552² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (25555144155551) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 448645858 + ... + 448702814.

It is an arithmetic number, because the mean of its divisors is an integer number (224290066770).

Almost surely, 2^{25555144155552} is an apocalyptic number.

25555144155552 is a gapful number since it is divisible by the number (22) 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 25555144155552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43063692819840).

25555144155552 is an abundant number, since it is smaller than the sum of its proper divisors (60572241484128).

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

25555144155552 is a wasteful number, since it uses less digits than its factorization.

25555144155552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59781 (or 59767 counting only the distinct ones).

The product of its digits is 25000000, while the sum is 54.

The spelling of 25555144155552 in words is "twenty-five trillion, five hundred fifty-five billion, one hundred forty-four million, one hundred fifty-five thousand, five hundred fifty-two".