25551536472 has 576 divisors, whose sum is σ = 92294691840. Its totient is φ = 6306854400.

The previous prime is 25551536429. The next prime is 25551536477. The reversal of 25551536472 is 27463515552.

It is a happy number.

25551536472 is a `hidden beast` number, since 2 + 5 + 5 + 515 + 3 + 64 + 72 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25551536477) 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 143 ways as a sum of consecutive naturals, for example, 80604058 + ... + 80604374.

It is an arithmetic number, because the mean of its divisors is an integer number (160233840).

Almost surely, 2^25551536472 is an apocalyptic number.

25551536472 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 25551536472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46147345920).

25551536472 is an abundant number, since it is smaller than the sum of its proper divisors (66743155368).

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

25551536472 is a wasteful number, since it uses less digits than its factorization.

25551536472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452 (or 438 counting only the distinct ones).

The product of its digits is 1260000, while the sum is 45.

The spelling of 25551536472 in words is "twenty-five billion, five hundred fifty-one million, five hundred thirty-six thousand, four hundred seventy-two".