51289173727 has 8 divisors (see below), whose sum is σ = 57007521360. Its totient is φ = 45746775360.

The previous prime is 51289173707. The next prime is 51289173751. The reversal of 51289173727 is 72737198215.

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

It is a de Polignac number, because none of the positive numbers 2^k-51289173727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51289173707) 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, 43986702 + ... + 43987867.

It is an arithmetic number, because the mean of its divisors is an integer number (7125940170).

Almost surely, 2^51289173727 is an apocalyptic number.

51289173727 is a deficient number, since it is larger than the sum of its proper divisors (5718347633).

51289173727 is a wasteful number, since it uses less digits than its factorization.

51289173727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87974633.

The product of its digits is 1481760, while the sum is 52.

The spelling of 51289173727 in words is "fifty-one billion, two hundred eighty-nine million, one hundred seventy-three thousand, seven hundred twenty-seven".