25436863452 has 480 divisors, whose sum is σ = 84444828160. Its totient is φ = 5795919360.

The previous prime is 25436863429. The next prime is 25436863471.

25436863452 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 591554943 + ... + 591554985.

Almost surely, 2^25436863452 is an apocalyptic number.

25436863452 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 25436863452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42222414080).

25436863452 is an abundant number, since it is smaller than the sum of its proper divisors (59007964708).

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

25436863452 is a wasteful number, since it uses less digits than its factorization.

25436863452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151 (or 116 counting only the distinct ones).

The product of its digits is 4147200, while the sum is 48.

It can be divided in two parts, 25436 and 863452, that added together give a palindrome (888888).

The spelling of 25436863452 in words is "twenty-five billion, four hundred thirty-six million, eight hundred sixty-three thousand, four hundred fifty-two".