6156561862564 has 9 divisors (see below), whose sum is σ = 10773991943841. Its totient is φ = 3078278450040.

The previous prime is 6156561862513. The next prime is 6156561862601. The reversal of 6156561862564 is 4652681656516.

The square root of 6156561862564 is 2481242.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 433941022564 + 5722620840000 = 658742^2 + 2392200^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4342174 + ... + 5582794.

Almost surely, 2^{6156561862564} is an apocalyptic number.

6156561862564 is the 2481242-nd square number.

It is an amenable number.

6156561862564 is a deficient number, since it is larger than the sum of its proper divisors (4617430081277).

6156561862564 is an frugal number, since it uses more digits than its factorization.

6156561862564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2481246 (or 1240623 counting only the distinct ones).

The product of its digits is 62208000, while the sum is 61.

The spelling of 6156561862564 in words is "six trillion, one hundred fifty-six billion, five hundred sixty-one million, eight hundred sixty-two thousand, five hundred sixty-four".