25150505813 has 4 divisors (see below), whose sum is σ = 25154076780. Its totient is φ = 25146934848.

The previous prime is 25150505741. The next prime is 25150505839. The reversal of 25150505813 is 31850505152.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19624367569 + 5526138244 = 140087^2 + 74338^2 .

It is a cyclic number.

It is not a de Polignac number, because 25150505813 - 2⁸ = 25150505557 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25150508813) 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, 1774898 + ... + 1789011.

It is an arithmetic number, because the mean of its divisors is an integer number (6288519195).

Almost surely, 2^25150505813 is an apocalyptic number.

It is an amenable number.

25150505813 is a deficient number, since it is larger than the sum of its proper divisors (3570967).

25150505813 is an equidigital number, since it uses as much as digits as its factorization.

25150505813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3570966.

The product of its (nonzero) digits is 30000, while the sum is 35.

The spelling of 25150505813 in words is "twenty-five billion, one hundred fifty million, five hundred five thousand, eight hundred thirteen".