25355455142436 has 108 divisors (see below), whose sum is σ = 65506166749660. Its totient is φ = 8269400937600.

The previous prime is 25355455142419. The next prime is 25355455142447. The reversal of 25355455142436 is 63424155455352.

It is a happy number.

25355455142436 is a `hidden beast` number, since 2 + 5 + 3 + 5 + 5 + 4 + 551 + 42 + 43 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2870503393536 + 22484951748900 = 1694256^2 + 4741830^2 .

It is a super-3 number, since 3×25355455142436³ (a number of 41 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 262460430 + ... + 262557018.

Almost surely, 2^{25355455142436} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25355455142436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32753083374830).

25355455142436 is an abundant number, since it is smaller than the sum of its proper divisors (40150711607224).

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

25355455142436 is a wasteful number, since it uses less digits than its factorization.

25355455142436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99994 (or 99942 counting only the distinct ones).

The product of its digits is 43200000, while the sum is 54.

The spelling of 25355455142436 in words is "twenty-five trillion, three hundred fifty-five billion, four hundred fifty-five million, one hundred forty-two thousand, four hundred thirty-six".