6139861444 has 12 divisors (see below), whose sum is σ = 10748170300. Its totient is φ = 3068955648.

The previous prime is 6139861439. The next prime is 6139861493. The reversal of 6139861444 is 4441689316.

It can be written as a sum of positive squares in 2 ways, for example, as 5352385600 + 787475844 = 73160^2 + 28062^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6139861394 and 6139861403.

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, 229509 + ... + 254860.

Almost surely, 2^6139861444 is an apocalyptic number.

It is an amenable number.

6139861444 is a deficient number, since it is larger than the sum of its proper divisors (4608308856).

6139861444 is a wasteful number, since it uses less digits than its factorization.

6139861444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487542 (or 487540 counting only the distinct ones).

The product of its digits is 497664, while the sum is 46.

The square root of 6139861444 is about 78357.2679717715. The cubic root of 6139861444 is about 1831.1314575209.

The spelling of 6139861444 in words is "six billion, one hundred thirty-nine million, eight hundred sixty-one thousand, four hundred forty-four".