236145432561 has 4 divisors (see below), whose sum is σ = 314860576752. Its totient is φ = 157430288372.

The previous prime is 236145432529. The next prime is 236145432619. The reversal of 236145432561 is 165234541632.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 236145432561 - 2⁵ = 236145432529 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (236145432361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39357572091 + ... + 39357572096.

It is an arithmetic number, because the mean of its divisors is an integer number (78715144188).

Almost surely, 2^236145432561 is an apocalyptic number.

It is an amenable number.

236145432561 is a deficient number, since it is larger than the sum of its proper divisors (78715144191).

236145432561 is an equidigital number, since it uses as much as digits as its factorization.

236145432561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78715144190.

The product of its digits is 518400, while the sum is 42.

The spelling of 236145432561 in words is "two hundred thirty-six billion, one hundred forty-five million, four hundred thirty-two thousand, five hundred sixty-one".