51383527665 has 8 divisors (see below), whose sum is σ = 82213644288. Its totient is φ = 27404548080.

The previous prime is 51383527631. The next prime is 51383527687. The reversal of 51383527665 is 56672538315.

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

It is not a de Polignac number, because 51383527665 - 2⁷ = 51383527537 is a prime.

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, 1712784241 + ... + 1712784270.

It is an arithmetic number, because the mean of its divisors is an integer number (10276705536).

Almost surely, 2^51383527665 is an apocalyptic number.

It is an amenable number.

51383527665 is a deficient number, since it is larger than the sum of its proper divisors (30830116623).

51383527665 is a wasteful number, since it uses less digits than its factorization.

51383527665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3425568519.

The product of its digits is 4536000, while the sum is 51.

The spelling of 51383527665 in words is "fifty-one billion, three hundred eighty-three million, five hundred twenty-seven thousand, six hundred sixty-five".