236452607981 has 2 divisors, whose sum is σ = 236452607982. Its totient is φ = 236452607980.

The previous prime is 236452607977. The next prime is 236452608017. The reversal of 236452607981 is 189706254632.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 162191452900 + 74261155081 = 402730^2 + 272509^2 .

It is a cyclic number.

It is not a de Polignac number, because 236452607981 - 2² = 236452607977 is a prime.

It is a super-2 number, since 2×236452607981² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (236452607081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 118226303990 + 118226303991.

It is an arithmetic number, because the mean of its divisors is an integer number (118226303991).

It is a 1-persistent number, because it is pandigital, but 2⋅236452607981 = 472905215962 is not.

Almost surely, 2^236452607981 is an apocalyptic number.

It is an amenable number.

236452607981 is a deficient number, since it is larger than the sum of its proper divisors (1).

236452607981 is an equidigital number, since it uses as much as digits as its factorization.

236452607981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4354560, while the sum is 53.

The spelling of 236452607981 in words is "two hundred thirty-six billion, four hundred fifty-two million, six hundred seven thousand, nine hundred eighty-one".