1613968866 has 36 divisors (see below), whose sum is σ = 3555346626. Its totient is φ = 529148160.

The previous prime is 1613968859. The next prime is 1613968877. The reversal of 1613968866 is 6688693161.

It can be written as a sum of positive squares in 3 ways, for example, as 722050641 + 891918225 = 26871^2 + 29865^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 54930 + ... + 79026.

Almost surely, 2^1613968866 is an apocalyptic number.

1613968866 is an abundant number, since it is smaller than the sum of its proper divisors (1941377760).

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

1613968866 is a wasteful number, since it uses less digits than its factorization.

1613968866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24227 (or 24163 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 54.

The square root of 1613968866 is about 40174.2313678806. The cubic root of 1613968866 is about 1173.0010051382.

The spelling of 1613968866 in words is "one billion, six hundred thirteen million, nine hundred sixty-eight thousand, eight hundred sixty-six".