650561742778 has 8 divisors (see below), whose sum is σ = 975880071072. Its totient is φ = 325268385756.

The previous prime is 650561742769. The next prime is 650561742791. The reversal of 650561742778 is 877247165056.

650561742778 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.

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, 6177550 + ... + 6281977.

It is an arithmetic number, because the mean of its divisors is an integer number (121985008884).

Almost surely, 2^650561742778 is an apocalyptic number.

650561742778 is a deficient number, since it is larger than the sum of its proper divisors (325318328294).

650561742778 is a wasteful number, since it uses less digits than its factorization.

650561742778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12485636.

The product of its (nonzero) digits is 19756800, while the sum is 58.

The spelling of 650561742778 in words is "six hundred fifty billion, five hundred sixty-one million, seven hundred forty-two thousand, seven hundred seventy-eight".