51984143789 has 2 divisors, whose sum is σ = 51984143790. Its totient is φ = 51984143788.

The previous prime is 51984143741. The next prime is 51984143801. The reversal of 51984143789 is 98734148915.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29879888164 + 22104255625 = 172858^2 + 148675^2 .

It is a cyclic number.

It is not a de Polignac number, because 51984143789 - 2²⁸ = 51715708333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51984143989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25992071894 + 25992071895.

It is an arithmetic number, because the mean of its divisors is an integer number (25992071895).

Almost surely, 2^51984143789 is an apocalyptic number.

It is an amenable number.

51984143789 is a deficient number, since it is larger than the sum of its proper divisors (1).

51984143789 is an equidigital number, since it uses as much as digits as its factorization.

51984143789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8709120, while the sum is 59.

The spelling of 51984143789 in words is "fifty-one billion, nine hundred eighty-four million, one hundred forty-three thousand, seven hundred eighty-nine".