4249749538 has 4 divisors (see below), whose sum is σ = 6374624310. Its totient is φ = 2124874768.

The previous prime is 4249749503. The next prime is 4249749563. The reversal of 4249749538 is 8359479424.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 3618383409 + 631366129 = 60153^2 + 25127^2 .

It is a super-2 number, since 2×4249749538² = 36120742271462426888, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1062437383 + ... + 1062437386.

Almost surely, 2^4249749538 is an apocalyptic number.

4249749538 is a deficient number, since it is larger than the sum of its proper divisors (2124874772).

4249749538 is a wasteful number, since it uses less digits than its factorization.

4249749538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2124874771.

The product of its digits is 8709120, while the sum is 55.

The square root of 4249749538 is about 65190.1030678737. The cubic root of 4249749538 is about 1619.7740804195.

The spelling of 4249749538 in words is "four billion, two hundred forty-nine million, seven hundred forty-nine thousand, five hundred thirty-eight".