2061718898 has 18 divisors (see below), whose sum is σ = 3134258253. Its totient is φ = 1017149760.

The previous prime is 2061718871. The next prime is 2061718943. The reversal of 2061718898 is 8988171602.

It can be written as a sum of positive squares in 2 ways, for example, as 2056350409 + 5368489 = 45347^2 + 2317^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=32107.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 6228593 + ... + 6228923.

Almost surely, 2^2061718898 is an apocalyptic number.

2061718898 is a deficient number, since it is larger than the sum of its proper divisors (1072539355).

2061718898 is an frugal number, since it uses more digits than its factorization.

2061718898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 858 (or 430 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 50.

The square root of 2061718898 is about 45406.1548471130. The cubic root of 2061718898 is about 1272.7501315063.

Multiplying 2061718898 by its sum of digits (50), we get a square (103085944900 = 321070²).

The spelling of 2061718898 in words is "two billion, sixty-one million, seven hundred eighteen thousand, eight hundred ninety-eight".