1668232518238 has 16 divisors (see below), whose sum is σ = 2939822340336. Its totient is φ = 699957699840.

The previous prime is 1668232518187. The next prime is 1668232518247. The reversal of 1668232518238 is 8328152328661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2916490131 + ... + 2916490702.

It is an arithmetic number, because the mean of its divisors is an integer number (183738896271).

Almost surely, 2^{1668232518238} is an apocalyptic number.

1668232518238 is a deficient number, since it is larger than the sum of its proper divisors (1271589822098).

1668232518238 is a wasteful number, since it uses less digits than its factorization.

1668232518238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5832980859.

The product of its digits is 6635520, while the sum is 55.

The spelling of 1668232518238 in words is "one trillion, six hundred sixty-eight billion, two hundred thirty-two million, five hundred eighteen thousand, two hundred thirty-eight".