149023733818 has 36 divisors (see below), whose sum is σ = 233384645610. Its totient is φ = 71282521408.

The previous prime is 149023733777. The next prime is 149023733857. The reversal of 149023733818 is 818337320941.

It can be written as a sum of positive squares in 9 ways, for example, as 146339146849 + 2684586969 = 382543^2 + 51813^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 508613280 + ... + 508613572.

Almost surely, 2^149023733818 is an apocalyptic number.

149023733818 is a deficient number, since it is larger than the sum of its proper divisors (84360911792).

149023733818 is an frugal number, since it uses more digits than its factorization.

149023733818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 963 (or 497 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 49.

The spelling of 149023733818 in words is "one hundred forty-nine billion, twenty-three million, seven hundred thirty-three thousand, eight hundred eighteen".