1890616738018 has 4 divisors (see below), whose sum is σ = 2835925107030. Its totient is φ = 945308369008.

The previous prime is 1890616738007. The next prime is 1890616738093. The reversal of 1890616738018 is 8108376160981.

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

It can be written as a sum of positive squares in only one way, i.e., 1001486552049 + 889130185969 = 1000743^2 + 942937^2 .

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 472654184503 + ... + 472654184506.

Almost surely, 2^{1890616738018} is an apocalyptic number.

1890616738018 is a deficient number, since it is larger than the sum of its proper divisors (945308369012).

1890616738018 is an equidigital number, since it uses as much as digits as its factorization.

1890616738018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 945308369011.

The product of its (nonzero) digits is 3483648, while the sum is 58.

The spelling of 1890616738018 in words is "one trillion, eight hundred ninety billion, six hundred sixteen million, seven hundred thirty-eight thousand, eighteen".