51705370387 has 8 divisors (see below), whose sum is σ = 56605176000. Its totient is φ = 46838784360.

The previous prime is 51705370369. The next prime is 51705370417. The reversal of 51705370387 is 78307350715.

It is a happy number.

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 51705370387 - 2³¹ = 49557886739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51705373387) 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, 8301637 + ... + 8307862.

It is an arithmetic number, because the mean of its divisors is an integer number (7075647000).

Almost surely, 2^51705370387 is an apocalyptic number.

51705370387 is a deficient number, since it is larger than the sum of its proper divisors (4899805613).

51705370387 is a wasteful number, since it uses less digits than its factorization.

51705370387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16609793.

The product of its (nonzero) digits is 617400, while the sum is 46.

The spelling of 51705370387 in words is "fifty-one billion, seven hundred five million, three hundred seventy thousand, three hundred eighty-seven".