1671161156 has 12 divisors (see below), whose sum is σ = 3342322368. Its totient is φ = 716211912.

The previous prime is 1671161147. The next prime is 1671161161. The reversal of 1671161156 is 6511611761.

1671161156 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29842136 + ... + 29842191.

It is an arithmetic number, because the mean of its divisors is an integer number (278526864).

Almost surely, 2^1671161156 is an apocalyptic number.

It is an amenable number.

1671161156 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1671161156 is a wasteful number, since it uses less digits than its factorization.

1671161156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59684338 (or 59684336 counting only the distinct ones).

The product of its digits is 7560, while the sum is 35.

The square root of 1671161156 is about 40879.8380133777. The cubic root of 1671161156 is about 1186.6959061866.

The spelling of 1671161156 in words is "one billion, six hundred seventy-one million, one hundred sixty-one thousand, one hundred fifty-six".