2198149538 has 24 divisors (see below), whose sum is σ = 3780398628. Its totient is φ = 954849792.

The previous prime is 2198149493. The next prime is 2198149549. The reversal of 2198149538 is 8359418912.

It can be written as a sum of positive squares in 6 ways, for example, as 243890689 + 1954258849 = 15617^2 + 44207^2 .

It is a super-2 number, since 2×2198149538² = 9663722782819226888, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 185531 + ... + 197022.

Almost surely, 2^2198149538 is an apocalyptic number.

2198149538 is a deficient number, since it is larger than the sum of its proper divisors (1582249090).

2198149538 is a wasteful number, since it uses less digits than its factorization.

2198149538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382598 (or 382585 counting only the distinct ones).

The product of its digits is 622080, while the sum is 50.

The square root of 2198149538 is about 46884.4274573125. The cubic root of 2198149538 is about 1300.2266938002.

The spelling of 2198149538 in words is "two billion, one hundred ninety-eight million, one hundred forty-nine thousand, five hundred thirty-eight".