51298905599 has 4 divisors (see below), whose sum is σ = 51493958736. Its totient is φ = 51103852464.

The previous prime is 51298905589. The next prime is 51298905667. The reversal of 51298905599 is 99550989215.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51298905599 - 2¹² = 51298901503 is a prime.

It is a super-2 number, since 2×51298905599² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51298905589) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97526174 + ... + 97526699.

It is an arithmetic number, because the mean of its divisors is an integer number (12873489684).

Almost surely, 2^51298905599 is an apocalyptic number.

51298905599 is a deficient number, since it is larger than the sum of its proper divisors (195053137).

51298905599 is a wasteful number, since it uses less digits than its factorization.

51298905599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195053136.

The product of its (nonzero) digits is 13122000, while the sum is 62.

The spelling of 51298905599 in words is "fifty-one billion, two hundred ninety-eight million, nine hundred five thousand, five hundred ninety-nine".