25122364913 has 2 divisors, whose sum is σ = 25122364914. Its totient is φ = 25122364912.

The previous prime is 25122364903. The next prime is 25122364921. The reversal of 25122364913 is 31946322152.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24933357409 + 189007504 = 157903^2 + 13748^2 .

It is a cyclic number.

It is not a de Polignac number, because 25122364913 - 2¹⁸ = 25122102769 is a prime.

It is a super-2 number, since 2×25122364913² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25122364903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12561182456 + 12561182457.

It is an arithmetic number, because the mean of its divisors is an integer number (12561182457).

Almost surely, 2^25122364913 is an apocalyptic number.

It is an amenable number.

25122364913 is a deficient number, since it is larger than the sum of its proper divisors (1).

25122364913 is an equidigital number, since it uses as much as digits as its factorization.

25122364913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 38.

The spelling of 25122364913 in words is "twenty-five billion, one hundred twenty-two million, three hundred sixty-four thousand, nine hundred thirteen".