190444947538 has 8 divisors (see below), whose sum is σ = 285776420940. Its totient is φ = 95186140560.

The previous prime is 190444947523. The next prime is 190444947557. The reversal of 190444947538 is 835749444091.

It can be written as a sum of positive squares in 2 ways, for example, as 183811985289 + 6632962249 = 428733^2 + 81443^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×190444947538² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18160053 + ... + 18170536.

Almost surely, 2^190444947538 is an apocalyptic number.

190444947538 is a deficient number, since it is larger than the sum of its proper divisors (95331473402).

190444947538 is a wasteful number, since it uses less digits than its factorization.

190444947538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36333212.

The product of its (nonzero) digits is 17418240, while the sum is 58.

The spelling of 190444947538 in words is "one hundred ninety billion, four hundred forty-four million, nine hundred forty-seven thousand, five hundred thirty-eight".