25570979723 has 2 divisors, whose sum is σ = 25570979724. Its totient is φ = 25570979722.

The previous prime is 25570979677. The next prime is 25570979803. The reversal of 25570979723 is 32797907552.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25570979723 is a prime.

It is not a weakly prime, because it can be changed into another prime (25570979023) 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, 12785489861 + 12785489862.

It is an arithmetic number, because the mean of its divisors is an integer number (12785489862).

Almost surely, 2^25570979723 is an apocalyptic number.

25570979723 is a deficient number, since it is larger than the sum of its proper divisors (1).

25570979723 is an equidigital number, since it uses as much as digits as its factorization.

25570979723 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8334900, while the sum is 56.

The spelling of 25570979723 in words is "twenty-five billion, five hundred seventy million, nine hundred seventy-nine thousand, seven hundred twenty-three".