51767778998 has 8 divisors (see below), whose sum is σ = 83624873808. Its totient is φ = 23892821064.

The previous prime is 51767778919. The next prime is 51767779003. The reversal of 51767778998 is 89987776715.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 995534186 + ... + 995534237.

It is an arithmetic number, because the mean of its divisors is an integer number (10453109226).

Almost surely, 2^51767778998 is an apocalyptic number.

51767778998 is a deficient number, since it is larger than the sum of its proper divisors (31857094810).

51767778998 is a wasteful number, since it uses less digits than its factorization.

51767778998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1991068438.

The product of its digits is 373403520, while the sum is 74.

The spelling of 51767778998 in words is "fifty-one billion, seven hundred sixty-seven million, seven hundred seventy-eight thousand, nine hundred ninety-eight".