25562479139 has 2 divisors, whose sum is σ = 25562479140. Its totient is φ = 25562479138.

The previous prime is 25562479121. The next prime is 25562479147. The reversal of 25562479139 is 93197426552.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25562479139 - 2¹⁶ = 25562413603 is a prime.

It is not a weakly prime, because it can be changed into another prime (25562479109) 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, 12781239569 + 12781239570.

It is an arithmetic number, because the mean of its divisors is an integer number (12781239570).

Almost surely, 2^25562479139 is an apocalyptic number.

25562479139 is a deficient number, since it is larger than the sum of its proper divisors (1).

25562479139 is an equidigital number, since it uses as much as digits as its factorization.

25562479139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4082400, while the sum is 53.

The spelling of 25562479139 in words is "twenty-five billion, five hundred sixty-two million, four hundred seventy-nine thousand, one hundred thirty-nine".