51759890064 has 45 divisors (see below), whose sum is σ = 144863444323. Its totient is φ = 17252386656.

The previous prime is 51759890051. The next prime is 51759890071. The reversal of 51759890064 is 46009895715.

The square root of 51759890064 is 227508.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2720617 + ... + 2739575.

Almost surely, 2^51759890064 is an apocalyptic number.

51759890064 is the 227508-th square number.

It is an amenable number.

51759890064 is an abundant number, since it is smaller than the sum of its proper divisors (93103554259).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51759890064 is an frugal number, since it uses more digits than its factorization.

51759890064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37932 (or 18964 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 54.

The spelling of 51759890064 in words is "fifty-one billion, seven hundred fifty-nine million, eight hundred ninety thousand, sixty-four".