1611711668 has 24 divisors (see below), whose sum is σ = 3227395584. Its totient is φ = 689882400.

The previous prime is 1611711667. The next prime is 1611711677. The reversal of 1611711668 is 8661171161.

It is a happy number.

It is a super-2 number, since 2×1611711668² = 5195229001534684448, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1611711667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12068 + ... + 58043.

It is an arithmetic number, because the mean of its divisors is an integer number (134474816).

Almost surely, 2^1611711668 is an apocalyptic number.

It is an amenable number.

1611711668 is an abundant number, since it is smaller than the sum of its proper divisors (1615683916).

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

1611711668 is a wasteful number, since it uses less digits than its factorization.

1611711668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70943 (or 70941 counting only the distinct ones).

The product of its digits is 12096, while the sum is 38.

The square root of 1611711668 is about 40146.1289292006. The cubic root of 1611711668 is about 1172.4539208997.

The spelling of 1611711668 in words is "one billion, six hundred eleven million, seven hundred eleven thousand, six hundred sixty-eight".