6135721156 has 6 divisors (see below), whose sum is σ = 10737512030. Its totient is φ = 3067860576.

The previous prime is 6135721147. The next prime is 6135721169. The reversal of 6135721156 is 6511275316.

It can be written as a sum of positive squares in only one way, i.e., 5903463556 + 232257600 = 76834^2 + 15240^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 766965141 + ... + 766965148.

Almost surely, 2^6135721156 is an apocalyptic number.

It is an amenable number.

6135721156 is a deficient number, since it is larger than the sum of its proper divisors (4601790874).

6135721156 is a wasteful number, since it uses less digits than its factorization.

6135721156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1533930293 (or 1533930291 counting only the distinct ones).

The product of its digits is 37800, while the sum is 37.

The square root of 6135721156 is about 78330.8442186091. The cubic root of 6135721156 is about 1830.7197698180.

The spelling of 6135721156 in words is "six billion, one hundred thirty-five million, seven hundred twenty-one thousand, one hundred fifty-six".