25452214452 has 216 divisors, whose sum is σ = 76901881056. Its totient is φ = 7073329536.

The previous prime is 25452214451. The next prime is 25452214453. The reversal of 25452214452 is 25441225452.

25452214452 is a `hidden beast` number, since 2 + 545 + 2 + 21 + 44 + 52 = 666.

It is an interprime number because it is at equal distance from previous prime (25452214451) and next prime (25452214453).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25452214451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 23286018 + ... + 23287110.

Almost surely, 2^25452214452 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 25452214452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38450940528).

25452214452 is an abundant number, since it is smaller than the sum of its proper divisors (51449666604).

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

25452214452 is a wasteful number, since it uses less digits than its factorization.

25452214452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1467 (or 1455 counting only the distinct ones).

The product of its digits is 128000, while the sum is 36.

The spelling of 25452214452 in words is "twenty-five billion, four hundred fifty-two million, two hundred fourteen thousand, four hundred fifty-two".