1611121016 has 16 divisors (see below), whose sum is σ = 3032003040. Its totient is φ = 802586880.

The previous prime is 1611121003. The next prime is 1611121019. The reversal of 1611121016 is 6101211161.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1611121019) 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, 369401 + ... + 373736.

It is an arithmetic number, because the mean of its divisors is an integer number (189500190).

Almost surely, 2^1611121016 is an apocalyptic number.

It is an amenable number.

1611121016 is a deficient number, since it is larger than the sum of its proper divisors (1420882024).

1611121016 is a wasteful number, since it uses less digits than its factorization.

1611121016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 743414 (or 743410 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 20.

The square root of 1611121016 is about 40138.7719792223. The cubic root of 1611121016 is about 1172.3106783912.

Adding to 1611121016 its reverse (6101211161), we get a palindrome (7712332177).

The spelling of 1611121016 in words is "one billion, six hundred eleven million, one hundred twenty-one thousand, sixteen".