51916866418 has 8 divisors (see below), whose sum is σ = 77876928000. Its totient is φ = 25957890420.

The previous prime is 51916866383. The next prime is 51916866427. The reversal of 51916866418 is 81466861915.

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

It is a super-2 number, since 2×51916866418² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 138898 + ... + 350893.

It is an arithmetic number, because the mean of its divisors is an integer number (9734616000).

Almost surely, 2^51916866418 is an apocalyptic number.

51916866418 is a deficient number, since it is larger than the sum of its proper divisors (25960061582).

51916866418 is a wasteful number, since it uses less digits than its factorization.

51916866418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542792.

The product of its digits is 2488320, while the sum is 55.

The spelling of 51916866418 in words is "fifty-one billion, nine hundred sixteen million, eight hundred sixty-six thousand, four hundred eighteen".