5121839761 has 4 divisors (see below), whose sum is σ = 5246762724. Its totient is φ = 4996916800.

The previous prime is 5121839759. The next prime is 5121839777. The reversal of 5121839761 is 1679381215.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 490356736 + 4631483025 = 22144^2 + 68055^2 .

It is a cyclic number.

It is not a de Polignac number, because 5121839761 - 2¹ = 5121839759 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5121839741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62461420 + ... + 62461501.

It is an arithmetic number, because the mean of its divisors is an integer number (1311690681).

Almost surely, 2^5121839761 is an apocalyptic number.

It is an amenable number.

5121839761 is a deficient number, since it is larger than the sum of its proper divisors (124922963).

5121839761 is a wasteful number, since it uses less digits than its factorization.

5121839761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124922962.

The product of its digits is 90720, while the sum is 43.

The square root of 5121839761 is about 71567.0298461519. The cubic root of 5121839761 is about 1723.7541671435.

The spelling of 5121839761 in words is "five billion, one hundred twenty-one million, eight hundred thirty-nine thousand, seven hundred sixty-one".