616721722 has 8 divisors (see below), whose sum is σ = 973771200. Its totient is φ = 292131324.

The previous prime is 616721689. The next prime is 616721723. The reversal of 616721722 is 227127616.

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

It is not an unprimeable number, because it can be changed into a prime (616721723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8114722 + ... + 8114797.

It is an arithmetic number, because the mean of its divisors is an integer number (121721400).

Almost surely, 2^616721722 is an apocalyptic number.

616721722 is a deficient number, since it is larger than the sum of its proper divisors (357049478).

616721722 is a wasteful number, since it uses less digits than its factorization.

616721722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16229540.

The product of its digits is 14112, while the sum is 34.

The square root of 616721722 is about 24833.8825397883. The cubic root of 616721722 is about 851.1963417035.

It can be divided in two parts, 6167 and 21722, that added together give a square (27889 = 167²).

The spelling of 616721722 in words is "six hundred sixteen million, seven hundred twenty-one thousand, seven hundred twenty-two".