25122364613 has 8 divisors (see below), whose sum is σ = 25472653848. Its totient is φ = 24772241664.

The previous prime is 25122364571. The next prime is 25122364627. The reversal of 25122364613 is 31646322152.

It can be written as a sum of positive squares in 4 ways, for example, as 676104004 + 24446260609 = 26002^2 + 156353^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 25122364613 - 2¹⁰ = 25122363589 is a prime.

It is a super-2 number, since 2×25122364613² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25122364913) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 279881 + ... + 358577.

It is an arithmetic number, because the mean of its divisors is an integer number (3184081731).

Almost surely, 2^25122364613 is an apocalyptic number.

It is an amenable number.

25122364613 is a deficient number, since it is larger than the sum of its proper divisors (350289235).

25122364613 is an equidigital number, since it uses as much as digits as its factorization.

25122364613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83143.

The product of its digits is 51840, while the sum is 35.

Adding to 25122364613 its reverse (31646322152), we get a palindrome (56768686765).

The spelling of 25122364613 in words is "twenty-five billion, one hundred twenty-two million, three hundred sixty-four thousand, six hundred thirteen".