1899379185418 has 128 divisors (see below), whose sum is σ = 3462528384000. Its totient is φ = 769941258240.

The previous prime is 1899379185397. The next prime is 1899379185419. The reversal of 1899379185418 is 8145819739981.

It is a Smith number, since the sum of its digits (73) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1899379185419) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1111397148 + ... + 1111398856.

It is an arithmetic number, because the mean of its divisors is an integer number (27051003000).

Almost surely, 2^{1899379185418} is an apocalyptic number.

1899379185418 is a deficient number, since it is larger than the sum of its proper divisors (1563149198582).

1899379185418 is a wasteful number, since it uses less digits than its factorization.

1899379185418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2800.

The product of its digits is 156764160, while the sum is 73.

The spelling of 1899379185418 in words is "one trillion, eight hundred ninety-nine billion, three hundred seventy-nine million, one hundred eighty-five thousand, four hundred eighteen".