51085378895 has 8 divisors (see below), whose sum is σ = 61313866704. Its totient is φ = 40860695104.

The previous prime is 51085378873. The next prime is 51085378921. The reversal of 51085378895 is 59887358015.

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 51085378895 - 2¹⁸ = 51085116751 is a prime.

It is a super-2 number, since 2×51085378895² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

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, 921374 + ... + 975243.

It is an arithmetic number, because the mean of its divisors is an integer number (7664233338).

Almost surely, 2^51085378895 is an apocalyptic number.

51085378895 is a deficient number, since it is larger than the sum of its proper divisors (10228487809).

51085378895 is a wasteful number, since it uses less digits than its factorization.

51085378895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1902009.

The product of its (nonzero) digits is 12096000, while the sum is 59.

The spelling of 51085378895 in words is "fifty-one billion, eighty-five million, three hundred seventy-eight thousand, eight hundred ninety-five".