25424974109 has 2 divisors, whose sum is σ = 25424974110. Its totient is φ = 25424974108.

The previous prime is 25424974103. The next prime is 25424974139. The reversal of 25424974109 is 90147942452.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23743728100 + 1681246009 = 154090^2 + 41003^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25424974109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25424974103) 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 as a sum of consecutive naturals, namely, 12712487054 + 12712487055.

It is an arithmetic number, because the mean of its divisors is an integer number (12712487055).

Almost surely, 2^25424974109 is an apocalyptic number.

It is an amenable number.

25424974109 is a deficient number, since it is larger than the sum of its proper divisors (1).

25424974109 is an equidigital number, since it uses as much as digits as its factorization.

25424974109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 725760, while the sum is 47.

The spelling of 25424974109 in words is "twenty-five billion, four hundred twenty-four million, nine hundred seventy-four thousand, one hundred nine".