1616722994 has 8 divisors (see below), whose sum is σ = 2431587180. Its totient is φ = 806193936.

The previous prime is 1616722993. The next prime is 1616723011. The reversal of 1616722994 is 4992276161.

It can be written as a sum of positive squares in 2 ways, for example, as 1473561769 + 143161225 = 38387^2 + 11965^2 .

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

It is a super-2 number, since 2×1616722994² = 5227586478656648072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1616722993) 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, 1082849 + ... + 1084340.

Almost surely, 2^1616722994 is an apocalyptic number.

1616722994 is a deficient number, since it is larger than the sum of its proper divisors (814864186).

1616722994 is a wasteful number, since it uses less digits than its factorization.

1616722994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2167564.

The product of its digits is 326592, while the sum is 47.

The square root of 1616722994 is about 40208.4940528740. The cubic root of 1616722994 is about 1173.6678414330.

The spelling of 1616722994 in words is "one billion, six hundred sixteen million, seven hundred twenty-two thousand, nine hundred ninety-four".