51738565881 has 8 divisors (see below), whose sum is σ = 70667309664. Its totient is φ = 33651099680.

The previous prime is 51738565873. The next prime is 51738565913. The reversal of 51738565881 is 18856583715.

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 51738565881 - 2³ = 51738565873 is a prime.

It is a super-2 number, since 2×51738565881² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51738565811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210319251 + ... + 210319496.

It is an arithmetic number, because the mean of its divisors is an integer number (8833413708).

Almost surely, 2^51738565881 is an apocalyptic number.

It is an amenable number.

51738565881 is a deficient number, since it is larger than the sum of its proper divisors (18928743783).

51738565881 is a wasteful number, since it uses less digits than its factorization.

51738565881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420638791.

The product of its digits is 8064000, while the sum is 57.

The spelling of 51738565881 in words is "fifty-one billion, seven hundred thirty-eight million, five hundred sixty-five thousand, eight hundred eighty-one".