51665226361 has 8 divisors (see below), whose sum is σ = 59052069824. Its totient is φ = 44279907120.

The previous prime is 51665226359. The next prime is 51665226397. The reversal of 51665226361 is 16362256615.

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 51665226361 - 2¹ = 51665226359 is a prime.

It is a super-2 number, since 2×51665226361² (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 (51665226661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 307470 + ... + 444823.

It is an arithmetic number, because the mean of its divisors is an integer number (7381508728).

Almost surely, 2^51665226361 is an apocalyptic number.

It is an amenable number.

51665226361 is a deficient number, since it is larger than the sum of its proper divisors (7386843463).

51665226361 is an equidigital number, since it uses as much as digits as its factorization.

51665226361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 762111.

The product of its digits is 388800, while the sum is 43.

The spelling of 51665226361 in words is "fifty-one billion, six hundred sixty-five million, two hundred twenty-six thousand, three hundred sixty-one".