51385083747 has 4 divisors (see below), whose sum is σ = 68513445000. Its totient is φ = 34256722496.

The previous prime is 51385083733. The next prime is 51385083751. The reversal of 51385083747 is 74738058315.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51385083747 - 2¹⁶ = 51385018211 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51385083747.

It is not an unprimeable number, because it can be changed into a prime (51385083727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8564180622 + ... + 8564180627.

It is an arithmetic number, because the mean of its divisors is an integer number (17128361250).

Almost surely, 2^51385083747 is an apocalyptic number.

51385083747 is a deficient number, since it is larger than the sum of its proper divisors (17128361253).

51385083747 is a wasteful number, since it uses less digits than its factorization.

51385083747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17128361252.

The product of its (nonzero) digits is 2822400, while the sum is 51.

The spelling of 51385083747 in words is "fifty-one billion, three hundred eighty-five million, eighty-three thousand, seven hundred forty-seven".