25165149739 has 2 divisors, whose sum is σ = 25165149740. Its totient is φ = 25165149738.

The previous prime is 25165149731. The next prime is 25165149743. The reversal of 25165149739 is 93794156152.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25165149739 - 2³ = 25165149731 is a prime.

It is a super-2 number, since 2×25165149739² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25165149731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12582574869 + 12582574870.

It is an arithmetic number, because the mean of its divisors is an integer number (12582574870).

Almost surely, 2^25165149739 is an apocalyptic number.

25165149739 is a deficient number, since it is larger than the sum of its proper divisors (1).

25165149739 is an equidigital number, since it uses as much as digits as its factorization.

25165149739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2041200, while the sum is 52.

The spelling of 25165149739 in words is "twenty-five billion, one hundred sixty-five million, one hundred forty-nine thousand, seven hundred thirty-nine".