51556550713 has 2 divisors, whose sum is σ = 51556550714. Its totient is φ = 51556550712.

The previous prime is 51556550659. The next prime is 51556550723. The reversal of 51556550713 is 31705565515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29214671929 + 22341878784 = 170923^2 + 149472^2 .

It is a cyclic number.

It is not a de Polignac number, because 51556550713 - 2²⁹ = 51019679801 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51556550713.

It is not a weakly prime, because it can be changed into another prime (51556550723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25778275356 + 25778275357.

It is an arithmetic number, because the mean of its divisors is an integer number (25778275357).

Almost surely, 2^51556550713 is an apocalyptic number.

It is an amenable number.

51556550713 is a deficient number, since it is larger than the sum of its proper divisors (1).

51556550713 is an equidigital number, since it uses as much as digits as its factorization.

51556550713 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 393750, while the sum is 43.

The spelling of 51556550713 in words is "fifty-one billion, five hundred fifty-six million, five hundred fifty thousand, seven hundred thirteen".