25615451652 has 48 divisors (see below), whose sum is σ = 70511357952. Its totient is φ = 7082612640.

The previous prime is 25615451579. The next prime is 25615451663.

25615451652 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4915878 + ... + 4921085.

It is an arithmetic number, because the mean of its divisors is an integer number (1468986624).

Almost surely, 2^25615451652 is an apocalyptic number.

It is an amenable number.

25615451652 is an abundant number, since it is smaller than the sum of its proper divisors (44895906300).

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

25615451652 is a wasteful number, since it uses less digits than its factorization.

25615451652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9837008 (or 9837006 counting only the distinct ones).

The product of its digits is 360000, while the sum is 42.

The spelling of 25615451652 in words is "twenty-five billion, six hundred fifteen million, four hundred fifty-one thousand, six hundred fifty-two".