51937966081 has 8 divisors (see below), whose sum is σ = 53355685544. Its totient is φ = 50520983040.

The previous prime is 51937966057. The next prime is 51937966099. The reversal of 51937966081 is 18066973915.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 36448919056 + 15489047025 = 190916^2 + 124455^2 .

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 51937966081 - 2²³ = 51929577473 is a prime.

It is a super-2 number, since 2×51937966081² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51937966681) 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 7 ways as a sum of consecutive naturals, for example, 39600 + ... + 324721.

It is an arithmetic number, because the mean of its divisors is an integer number (6669460693).

Almost surely, 2^51937966081 is an apocalyptic number.

It is an amenable number.

51937966081 is a deficient number, since it is larger than the sum of its proper divisors (1417719463).

51937966081 is a wasteful number, since it uses less digits than its factorization.

51937966081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368211.

The product of its (nonzero) digits is 2449440, while the sum is 55.

The spelling of 51937966081 in words is "fifty-one billion, nine hundred thirty-seven million, nine hundred sixty-six thousand, eighty-one".