4861564834538 has 4 divisors (see below), whose sum is σ = 7292347251810. Its totient is φ = 2430782417268.

The previous prime is 4861564834519. The next prime is 4861564834547. The reversal of 4861564834538 is 8354384651684.

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., 4681740495289 + 179824339249 = 2163733^2 + 424057^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1215391208633 + ... + 1215391208636.

Almost surely, 2^{4861564834538} is an apocalyptic number.

4861564834538 is a deficient number, since it is larger than the sum of its proper divisors (2430782417272).

4861564834538 is a wasteful number, since it uses less digits than its factorization.

4861564834538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2430782417271.

The product of its digits is 265420800, while the sum is 65.

The spelling of 4861564834538 in words is "four trillion, eight hundred sixty-one billion, five hundred sixty-four million, eight hundred thirty-four thousand, five hundred thirty-eight".