51056049999 has 12 divisors (see below), whose sum is σ = 69105957144. Its totient is φ = 33529337424.

The previous prime is 51056049959. The next prime is 51056050027. The reversal of 51056049999 is 99994065015.

It is not a de Polignac number, because 51056049999 - 2¹¹ = 51056047951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51056049949) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1882132 + ... + 1909065.

It is an arithmetic number, because the mean of its divisors is an integer number (5758829762).

Almost surely, 2^51056049999 is an apocalyptic number.

51056049999 is a deficient number, since it is larger than the sum of its proper divisors (18049907145).

51056049999 is an equidigital number, since it uses as much as digits as its factorization.

51056049999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3791334 (or 3791267 counting only the distinct ones).

The product of its (nonzero) digits is 3936600, while the sum is 57.

The spelling of 51056049999 in words is "fifty-one billion, fifty-six million, forty-nine thousand, nine hundred ninety-nine".