51540457518829 has 2 divisors, whose sum is σ = 51540457518830. Its totient is φ = 51540457518828.

The previous prime is 51540457518773. The next prime is 51540457518841. The reversal of 51540457518829 is 92881575404515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50929204060900 + 611253457929 = 7136470^2 + 781827^2 .

It is a cyclic number.

It is not a de Polignac number, because 51540457518829 - 2¹¹ = 51540457516781 is a prime.

It is a super-2 number, since 2×51540457518829² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51540457518859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25770228759414 + 25770228759415.

It is an arithmetic number, because the mean of its divisors is an integer number (25770228759415).

Almost surely, 2^{51540457518829} is an apocalyptic number.

It is an amenable number.

51540457518829 is a deficient number, since it is larger than the sum of its proper divisors (1).

51540457518829 is an equidigital number, since it uses as much as digits as its factorization.

51540457518829 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80640000, while the sum is 64.

The spelling of 51540457518829 in words is "fifty-one trillion, five hundred forty billion, four hundred fifty-seven million, five hundred eighteen thousand, eight hundred twenty-nine".