6121810564 has 81 divisors (see below), whose sum is σ = 11877279141. Its totient is φ = 2760377760.

The previous prime is 6121810547. The next prime is 6121810577. The reversal of 6121810564 is 4650181216.

The square root of 6121810564 is 78242.

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., 3210128964 + 2911681600 = 56658^2 + 53960^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 86222649 + ... + 86222719.

Almost surely, 2^6121810564 is an apocalyptic number.

6121810564 is the 78242-nd square number.

It is an amenable number.

6121810564 is a deficient number, since it is larger than the sum of its proper divisors (5755468577).

6121810564 is a wasteful number, since it uses less digits than its factorization.

6121810564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242 (or 121 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 34.

The cubic root of 6121810564 is about 1829.3352183376.

The spelling of 6121810564 in words is "six billion, one hundred twenty-one million, eight hundred ten thousand, five hundred sixty-four".