252406771691 has 2 divisors, whose sum is σ = 252406771692. Its totient is φ = 252406771690.

The previous prime is 252406771627. The next prime is 252406771759. The reversal of 252406771691 is 196177604252.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 252406771691 - 2⁶ = 252406771627 is a prime.

It is not a weakly prime, because it can be changed into another prime (252406771291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126203385845 + 126203385846.

It is an arithmetic number, because the mean of its divisors is an integer number (126203385846).

Almost surely, 2^252406771691 is an apocalyptic number.

252406771691 is a deficient number, since it is larger than the sum of its proper divisors (1).

252406771691 is an equidigital number, since it uses as much as digits as its factorization.

252406771691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1270080, while the sum is 50.

The spelling of 252406771691 in words is "two hundred fifty-two billion, four hundred six million, seven hundred seventy-one thousand, six hundred ninety-one".