51775959778 has 8 divisors (see below), whose sum is σ = 81040632768. Its totient is φ = 24762415524.

The previous prime is 51775959769. The next prime is 51775959791. The reversal of 51775959778 is 87795957715.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 562782126 + ... + 562782217.

It is an arithmetic number, because the mean of its divisors is an integer number (10130079096).

Almost surely, 2^51775959778 is an apocalyptic number.

51775959778 is a deficient number, since it is larger than the sum of its proper divisors (29264672990).

51775959778 is a wasteful number, since it uses less digits than its factorization.

51775959778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1125564368.

The product of its digits is 194481000, while the sum is 70.

The spelling of 51775959778 in words is "fifty-one billion, seven hundred seventy-five million, nine hundred fifty-nine thousand, seven hundred seventy-eight".