25215542352 has 1440 divisors, whose sum is σ = 107575336960. Its totient is φ = 5542732800.

The previous prime is 25215542329. The next prime is 25215542357. The reversal of 25215542352 is 25324551252.

25215542352 is a `hidden beast` number, since 2 + 52 + 1 + 554 + 2 + 3 + 52 = 666.

It is a super-2 number, since 2×25215542352² (a number of 22 digits) contains 22 as substring.

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 (25215542357) 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 287 ways as a sum of consecutive naturals, for example, 813404577 + ... + 813404607.

Almost surely, 2^25215542352 is an apocalyptic number.

25215542352 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 25215542352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53787668480).

25215542352 is an abundant number, since it is smaller than the sum of its proper divisors (82359794608).

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

25215542352 is a wasteful number, since it uses less digits than its factorization.

25215542352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115 (or 86 counting only the distinct ones).

The product of its digits is 120000, while the sum is 36.

The spelling of 25215542352 in words is "twenty-five billion, two hundred fifteen million, five hundred forty-two thousand, three hundred fifty-two".