25564252015 has 8 divisors (see below), whose sum is σ = 30679116768. Its totient is φ = 20450058720.

The previous prime is 25564252003. The next prime is 25564252073. The reversal of 25564252015 is 51025246552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25564252015 - 2¹⁷ = 25564120943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79912 + ... + 239821.

It is an arithmetic number, because the mean of its divisors is an integer number (3834889596).

Almost surely, 2^25564252015 is an apocalyptic number.

25564252015 is a deficient number, since it is larger than the sum of its proper divisors (5114864753).

25564252015 is a wasteful number, since it uses less digits than its factorization.

25564252015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335729.

The product of its (nonzero) digits is 120000, while the sum is 37.

Adding to 25564252015 its reverse (51025246552), we get a palindrome (76589498567).

The spelling of 25564252015 in words is "twenty-five billion, five hundred sixty-four million, two hundred fifty-two thousand, fifteen".