25344247099 has 2 divisors, whose sum is σ = 25344247100. Its totient is φ = 25344247098.

The previous prime is 25344247057. The next prime is 25344247111. The reversal of 25344247099 is 99074244352.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25344247099 is a prime.

It is a super-2 number, since 2×25344247099² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25344247399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12672123549 + 12672123550.

It is an arithmetic number, because the mean of its divisors is an integer number (12672123550).

Almost surely, 2^25344247099 is an apocalyptic number.

25344247099 is a deficient number, since it is larger than the sum of its proper divisors (1).

25344247099 is an equidigital number, since it uses as much as digits as its factorization.

25344247099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2177280, while the sum is 49.

The spelling of 25344247099 in words is "twenty-five billion, three hundred forty-four million, two hundred forty-seven thousand, ninety-nine".