1611916660 has 12 divisors (see below), whose sum is σ = 3385025028. Its totient is φ = 644766656.

The previous prime is 1611916651. The next prime is 1611916667. The reversal of 1611916660 is 666191161.

It can be written as a sum of positive squares in 2 ways, for example, as 589324176 + 1022592484 = 24276^2 + 31978^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1611916667) 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, 40297897 + ... + 40297936.

It is an arithmetic number, because the mean of its divisors is an integer number (282085419).

Almost surely, 2^1611916660 is an apocalyptic number.

1611916660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1611916660 is an abundant number, since it is smaller than the sum of its proper divisors (1773108368).

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

1611916660 is a wasteful number, since it uses less digits than its factorization.

1611916660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80595842 (or 80595840 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 1611916660 is about 40148.6819210793. The cubic root of 1611916660 is about 1172.5036265408.

The spelling of 1611916660 in words is "one billion, six hundred eleven million, nine hundred sixteen thousand, six hundred sixty".