235644660042 has 64 divisors (see below), whose sum is σ = 521007759360. Its totient is φ = 70454030400.

The previous prime is 235644660029. The next prime is 235644660073. The reversal of 235644660042 is 240066446532.

It is a junction number, because it is equal to n+sod(n) for n = 235644659976 and 235644660003.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7769367 + ... + 7799637.

It is an arithmetic number, because the mean of its divisors is an integer number (8140746240).

Almost surely, 2^235644660042 is an apocalyptic number.

235644660042 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 235644660042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (260503879680).

235644660042 is an abundant number, since it is smaller than the sum of its proper divisors (285363099318).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

235644660042 is a wasteful number, since it uses less digits than its factorization.

235644660042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31859.

The product of its (nonzero) digits is 829440, while the sum is 42.

The spelling of 235644660042 in words is "two hundred thirty-five billion, six hundred forty-four million, six hundred sixty thousand, forty-two".