64803161778 has 8 divisors (see below), whose sum is σ = 129606323568. Its totient is φ = 21601053924.

The previous prime is 64803161749. The next prime is 64803161789. The reversal of 64803161778 is 87716130846.

64803161778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

64803161778 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 64803161778.

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, 5400263476 + ... + 5400263487.

It is an arithmetic number, because the mean of its divisors is an integer number (16200790446).

Almost surely, 2^64803161778 is an apocalyptic number.

64803161778 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

64803161778 is a wasteful number, since it uses less digits than its factorization.

64803161778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10800526968.

The product of its (nonzero) digits is 1354752, while the sum is 51.

The spelling of 64803161778 in words is "sixty-four billion, eight hundred three million, one hundred sixty-one thousand, seven hundred seventy-eight".