25011252613 has 4 divisors (see below), whose sum is σ = 25070945760. Its totient is φ = 24951559468.

The previous prime is 25011252557. The next prime is 25011252659. The reversal of 25011252613 is 31625211052.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25011252613 - 2²¹ = 25009155461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25011292613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29845945 + ... + 29846782.

It is an arithmetic number, because the mean of its divisors is an integer number (6267736440).

Almost surely, 2^25011252613 is an apocalyptic number.

It is an amenable number.

25011252613 is a deficient number, since it is larger than the sum of its proper divisors (59693147).

25011252613 is an equidigital number, since it uses as much as digits as its factorization.

25011252613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59693146.

The product of its (nonzero) digits is 3600, while the sum is 28.

Adding to 25011252613 its reverse (31625211052), we get a palindrome (56636463665).

The spelling of 25011252613 in words is "twenty-five billion, eleven million, two hundred fifty-two thousand, six hundred thirteen".