51543425399 has 2 divisors, whose sum is σ = 51543425400. Its totient is φ = 51543425398.

The previous prime is 51543425393. The next prime is 51543425429. The reversal of 51543425399 is 99352434515.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51543425399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51543425393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25771712699 + 25771712700.

It is an arithmetic number, because the mean of its divisors is an integer number (25771712700).

Almost surely, 2^51543425399 is an apocalyptic number.

51543425399 is a deficient number, since it is larger than the sum of its proper divisors (1).

51543425399 is an equidigital number, since it uses as much as digits as its factorization.

51543425399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2916000, while the sum is 50.

The spelling of 51543425399 in words is "fifty-one billion, five hundred forty-three million, four hundred twenty-five thousand, three hundred ninety-nine".