51726805919 has 2 divisors, whose sum is σ = 51726805920. Its totient is φ = 51726805918.

The previous prime is 51726805909. The next prime is 51726806009. The reversal of 51726805919 is 91950862715.

It is a happy number.

51726805919 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51726805919 - 2¹⁶ = 51726740383 is a prime.

It is a super-2 number, since 2×51726805919² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51726805909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25863402959 + 25863402960.

It is an arithmetic number, because the mean of its divisors is an integer number (25863402960).

Almost surely, 2^51726805919 is an apocalyptic number.

51726805919 is a deficient number, since it is larger than the sum of its proper divisors (1).

51726805919 is an equidigital number, since it uses as much as digits as its factorization.

51726805919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1360800, while the sum is 53.

The spelling of 51726805919 in words is "fifty-one billion, seven hundred twenty-six million, eight hundred five thousand, nine hundred nineteen".