51969556543 has 2 divisors, whose sum is σ = 51969556544. Its totient is φ = 51969556542.

The previous prime is 51969556511. The next prime is 51969556559. The reversal of 51969556543 is 34565596915.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51969556543 - 2⁵ = 51969556511 is a prime.

It is a super-2 number, since 2×51969556543² (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 (51969506543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25984778271 + 25984778272.

It is an arithmetic number, because the mean of its divisors is an integer number (25984778272).

Almost surely, 2^51969556543 is an apocalyptic number.

51969556543 is a deficient number, since it is larger than the sum of its proper divisors (1).

51969556543 is an equidigital number, since it uses as much as digits as its factorization.

51969556543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21870000, while the sum is 58.

The spelling of 51969556543 in words is "fifty-one billion, nine hundred sixty-nine million, five hundred fifty-six thousand, five hundred forty-three".