51630799439 has 2 divisors, whose sum is σ = 51630799440. Its totient is φ = 51630799438.

The previous prime is 51630799427. The next prime is 51630799447. The reversal of 51630799439 is 93499703615.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51630799439 - 2⁸ = 51630799183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51630799469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25815399719 + 25815399720.

It is an arithmetic number, because the mean of its divisors is an integer number (25815399720).

Almost surely, 2^51630799439 is an apocalyptic number.

51630799439 is a deficient number, since it is larger than the sum of its proper divisors (1).

51630799439 is an equidigital number, since it uses as much as digits as its factorization.

51630799439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5511240, while the sum is 56.

The spelling of 51630799439 in words is "fifty-one billion, six hundred thirty million, seven hundred ninety-nine thousand, four hundred thirty-nine".