25555280279939 has 2 divisors, whose sum is σ = 25555280279940. Its totient is φ = 25555280279938.

The previous prime is 25555280279927. The next prime is 25555280280071. The reversal of 25555280279939 is 93997208255552.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25555280279939 is a prime.

It is not a weakly prime, because it can be changed into another prime (25555280279909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12777640139969 + 12777640139970.

It is an arithmetic number, because the mean of its divisors is an integer number (12777640139970).

Almost surely, 2^{25555280279939} is an apocalyptic number.

25555280279939 is a deficient number, since it is larger than the sum of its proper divisors (1).

25555280279939 is an equidigital number, since it uses as much as digits as its factorization.

25555280279939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 612360000, while the sum is 71.

The spelling of 25555280279939 in words is "twenty-five trillion, five hundred fifty-five billion, two hundred eighty million, two hundred seventy-nine thousand, nine hundred thirty-nine".