25352994816 has 240 divisors, whose sum is σ = 76336260000. Its totient is φ = 8408530944.

The previous prime is 25352994811. The next prime is 25352994817. The reversal of 25352994816 is 61849925352.

25352994816 is a `hidden beast` number, since 2 + 535 + 2 + 9 + 94 + 8 + 16 = 666.

It is a super-2 number, since 2×25352994816² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (25352994811) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 127401885 + ... + 127402083.

It is an arithmetic number, because the mean of its divisors is an integer number (318067750).

Almost surely, 2^25352994816 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 25352994816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38168130000).

25352994816 is an abundant number, since it is smaller than the sum of its proper divisors (50983265184).

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

25352994816 is an frugal number, since it uses more digits than its factorization.

25352994816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252 (or 204 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 54.

The spelling of 25352994816 in words is "twenty-five billion, three hundred fifty-two million, nine hundred ninety-four thousand, eight hundred sixteen".