236406134721 has 16 divisors (see below), whose sum is σ = 315558621504. Its totient is φ = 157428969984.

The previous prime is 236406134669. The next prime is 236406134737. The reversal of 236406134721 is 127431604632.

It is not a de Polignac number, because 236406134721 - 2¹⁹ = 236405610433 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 236406134721.

It is not an unprimeable number, because it can be changed into a prime (236406134761) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11063770 + ... + 11085116.

It is an arithmetic number, because the mean of its divisors is an integer number (19722413844).

Almost surely, 2^236406134721 is an apocalyptic number.

It is an amenable number.

236406134721 is a deficient number, since it is larger than the sum of its proper divisors (79152486783).

236406134721 is a wasteful number, since it uses less digits than its factorization.

236406134721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25280.

The product of its (nonzero) digits is 145152, while the sum is 39.

The spelling of 236406134721 in words is "two hundred thirty-six billion, four hundred six million, one hundred thirty-four thousand, seven hundred twenty-one".