2136161656 has 64 divisors (see below), whose sum is σ = 4357670400. Its totient is φ = 977843712.

The previous prime is 2136161653. The next prime is 2136161681. The reversal of 2136161656 is 6561616312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2136161653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1143235 + ... + 1145101.

It is an arithmetic number, because the mean of its divisors is an integer number (68088600).

Almost surely, 2^2136161656 is an apocalyptic number.

It is an amenable number.

2136161656 is an abundant number, since it is smaller than the sum of its proper divisors (2221508744).

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

2136161656 is a wasteful number, since it uses less digits than its factorization.

2136161656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2116 (or 2112 counting only the distinct ones).

The product of its digits is 38880, while the sum is 37.

The square root of 2136161656 is about 46218.6288848988. The cubic root of 2136161656 is about 1287.8878273130.

Adding to 2136161656 its reverse (6561616312), we get a palindrome (8697777968).

The spelling of 2136161656 in words is "two billion, one hundred thirty-six million, one hundred sixty-one thousand, six hundred fifty-six".