25145630272 has 84 divisors (see below), whose sum is σ = 58381811100. Its totient is φ = 10714174464.

The previous prime is 25145630269. The next prime is 25145630309. The reversal of 25145630272 is 27203654152.

It can be written as a sum of positive squares in 2 ways, for example, as 14307987456 + 10837642816 = 119616^2 + 104104^2 .

It is a super-2 number, since 2×25145630272² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 519354 + ... + 565702.

Almost surely, 2^25145630272 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 25145630272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29190905550).

25145630272 is an abundant number, since it is smaller than the sum of its proper divisors (33236180828).

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

25145630272 is a wasteful number, since it uses less digits than its factorization.

25145630272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46548 (or 46531 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 37.

The spelling of 25145630272 in words is "twenty-five billion, one hundred forty-five million, six hundred thirty thousand, two hundred seventy-two".