51420434005 has 8 divisors (see below), whose sum is σ = 61711635672. Its totient is φ = 41131603968.

The previous prime is 51420433993. The next prime is 51420434041. The reversal of 51420434005 is 50043402415.

It can be written as a sum of positive squares in 4 ways, for example, as 11755330084 + 39665103921 = 108422^2 + 199161^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51420434005 - 2⁵ = 51420433973 is a prime.

It is a super-2 number, since 2×51420434005² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 544852 + ... + 632221.

It is an arithmetic number, because the mean of its divisors is an integer number (7713954459).

Almost surely, 2^51420434005 is an apocalyptic number.

It is an amenable number.

51420434005 is a deficient number, since it is larger than the sum of its proper divisors (10291201667).

51420434005 is a wasteful number, since it uses less digits than its factorization.

51420434005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1185815.

The product of its (nonzero) digits is 9600, while the sum is 28.

The spelling of 51420434005 in words is "fifty-one billion, four hundred twenty million, four hundred thirty-four thousand, five".