25464352144 has 120 divisors (see below), whose sum is σ = 62689880448. Its totient is φ = 9908478720.

The previous prime is 25464352127. The next prime is 25464352153. The reversal of 25464352144 is 44125346452.

It is a super-2 number, since 2×25464352144² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25464352097 and 25464352106.

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 23 ways as a sum of consecutive naturals, for example, 9510934 + ... + 9513610.

Almost surely, 2^25464352144 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 25464352144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31344940224).

25464352144 is an abundant number, since it is smaller than the sum of its proper divisors (37225528304).

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

25464352144 is a wasteful number, since it uses less digits than its factorization.

25464352144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3813 (or 3800 counting only the distinct ones).

The product of its digits is 460800, while the sum is 40.

Adding to 25464352144 its reverse (44125346452), we get a palindrome (69589698596).

The spelling of 25464352144 in words is "twenty-five billion, four hundred sixty-four million, three hundred fifty-two thousand, one hundred forty-four".