51778613290 has 16 divisors (see below), whose sum is σ = 93912968160. Its totient is φ = 20553342160.

The previous prime is 51778613261. The next prime is 51778613303. The reversal of 51778613290 is 9231687715.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19761520 + ... + 19764139.

It is an arithmetic number, because the mean of its divisors is an integer number (5869560510).

Almost surely, 2^51778613290 is an apocalyptic number.

51778613290 is a deficient number, since it is larger than the sum of its proper divisors (42134354870).

51778613290 is a wasteful number, since it uses less digits than its factorization.

51778613290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39525797.

The product of its (nonzero) digits is 635040, while the sum is 49.

The spelling of 51778613290 in words is "fifty-one billion, seven hundred seventy-eight million, six hundred thirteen thousand, two hundred ninety".