235644640051 has 4 divisors (see below), whose sum is σ = 235646070912. Its totient is φ = 235643209192.

The previous prime is 235644640039. The next prime is 235644640111. The reversal of 235644640051 is 150046446532.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 235644640051 - 2¹¹ = 235644638003 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 235644639986 and 235644640013.

It is not an unprimeable number, because it can be changed into a prime (235644643051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 430600 + ... + 810373.

It is an arithmetic number, because the mean of its divisors is an integer number (58911517728).

Almost surely, 2^235644640051 is an apocalyptic number.

235644640051 is a deficient number, since it is larger than the sum of its proper divisors (1430861).

235644640051 is a wasteful number, since it uses less digits than its factorization.

235644640051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1430860.

The product of its (nonzero) digits is 345600, while the sum is 40.

The spelling of 235644640051 in words is "two hundred thirty-five billion, six hundred forty-four million, six hundred forty thousand, fifty-one".