253531966500881 has 2 divisors, whose sum is σ = 253531966500882. Its totient is φ = 253531966500880.

The previous prime is 253531966500749. The next prime is 253531966500907. The reversal of 253531966500881 is 188005669135352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 211266690120256 + 42265276380625 = 14535016^2 + 6501175^2 .

It is a cyclic number.

It is not a de Polignac number, because 253531966500881 - 2³⁸ = 253257088593937 is a prime.

It is a super-2 number, since 2×253531966500881² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (253531966500581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126765983250440 + 126765983250441.

It is an arithmetic number, because the mean of its divisors is an integer number (126765983250441).

Almost surely, 2^{253531966500881} is an apocalyptic number.

It is an amenable number.

253531966500881 is a deficient number, since it is larger than the sum of its proper divisors (1).

253531966500881 is an equidigital number, since it uses as much as digits as its factorization.

253531966500881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656000, while the sum is 62.

The spelling of 253531966500881 in words is "two hundred fifty-three trillion, five hundred thirty-one billion, nine hundred sixty-six million, five hundred thousand, eight hundred eighty-one".