25615340452 has 12 divisors (see below), whose sum is σ = 48275064796. Its totient is φ = 11822464800.

The previous prime is 25615340449. The next prime is 25615340479. The reversal of 25615340452 is 25404351652.

It can be written as a sum of positive squares in 2 ways, for example, as 15134904576 + 10480435876 = 123024^2 + 102374^2 .

It is a super-2 number, since 2×25615340452² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

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 3 ways as a sum of consecutive naturals, for example, 246301299 + ... + 246301402.

Almost surely, 2^25615340452 is an apocalyptic number.

It is an amenable number.

25615340452 is a deficient number, since it is larger than the sum of its proper divisors (22659724344).

25615340452 is a wasteful number, since it uses less digits than its factorization.

25615340452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492602718 (or 492602716 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 37.

The spelling of 25615340452 in words is "twenty-five billion, six hundred fifteen million, three hundred forty thousand, four hundred fifty-two".