51939736386049 has 4 divisors (see below), whose sum is σ = 51963860743236. Its totient is φ = 51915612028864.

The previous prime is 51939736386011. The next prime is 51939736386053. The reversal of 51939736386049 is 94068363793915.

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 22569102983025 + 29370633403024 = 4750695^2 + 5419468^2 .

It is a cyclic number.

It is not a de Polignac number, because 51939736386049 - 2⁴¹ = 49740713130497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51939736386079) 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, 12062175364 + ... + 12062179669.

It is an arithmetic number, because the mean of its divisors is an integer number (12990965185809).

Almost surely, 2^{51939736386049} is an apocalyptic number.

It is an amenable number.

51939736386049 is a deficient number, since it is larger than the sum of its proper divisors (24124357187).

51939736386049 is a wasteful number, since it uses less digits than its factorization.

51939736386049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24124357186.

The product of its (nonzero) digits is 793618560, while the sum is 73.

The spelling of 51939736386049 in words is "fifty-one trillion, nine hundred thirty-nine billion, seven hundred thirty-six million, three hundred eighty-six thousand, forty-nine".