25721423627 has 2 divisors, whose sum is σ = 25721423628. Its totient is φ = 25721423626.

The previous prime is 25721423617. The next prime is 25721423669. The reversal of 25721423627 is 72632412752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25721423627 - 2²² = 25717229323 is a prime.

It is not a weakly prime, because it can be changed into another prime (25721423617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12860711813 + 12860711814.

It is an arithmetic number, because the mean of its divisors is an integer number (12860711814).

Almost surely, 2^25721423627 is an apocalyptic number.

25721423627 is a deficient number, since it is larger than the sum of its proper divisors (1).

25721423627 is an equidigital number, since it uses as much as digits as its factorization.

25721423627 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 282240, while the sum is 41.

The spelling of 25721423627 in words is "twenty-five billion, seven hundred twenty-one million, four hundred twenty-three thousand, six hundred twenty-seven".