51663003819 has 16 divisors (see below), whose sum is σ = 78727968768. Its totient is φ = 29520444672.

The previous prime is 51663003817. The next prime is 51663003823. The reversal of 51663003819 is 91830036615.

It is a happy number.

It is not a de Polignac number, because 51663003819 - 2¹ = 51663003817 is a prime.

It is a super-2 number, since 2×51663003819² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51663003817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 685254 + ... + 756900.

It is an arithmetic number, because the mean of its divisors is an integer number (4920498048).

Almost surely, 2^51663003819 is an apocalyptic number.

51663003819 is a deficient number, since it is larger than the sum of its proper divisors (27064964949).

51663003819 is a wasteful number, since it uses less digits than its factorization.

51663003819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105994.

The product of its (nonzero) digits is 116640, while the sum is 42.

The spelling of 51663003819 in words is "fifty-one billion, six hundred sixty-three million, three thousand, eight hundred nineteen".