51630556199 has 2 divisors, whose sum is σ = 51630556200. Its totient is φ = 51630556198.

The previous prime is 51630556139. The next prime is 51630556253. The reversal of 51630556199 is 99165503615.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51630556199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51630556139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25815278099 + 25815278100.

It is an arithmetic number, because the mean of its divisors is an integer number (25815278100).

Almost surely, 2^51630556199 is an apocalyptic number.

51630556199 is a deficient number, since it is larger than the sum of its proper divisors (1).

51630556199 is an equidigital number, since it uses as much as digits as its factorization.

51630556199 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1093500, while the sum is 50.

The spelling of 51630556199 in words is "fifty-one billion, six hundred thirty million, five hundred fifty-six thousand, one hundred ninety-nine".