2136561766 has 16 divisors (see below), whose sum is σ = 3215995056. Its totient is φ = 1064570976.

The previous prime is 2136561743. The next prime is 2136561773. The reversal of 2136561766 is 6671656312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 875500 + ... + 877936.

It is an arithmetic number, because the mean of its divisors is an integer number (200999691).

Almost surely, 2^2136561766 is an apocalyptic number.

2136561766 is a deficient number, since it is larger than the sum of its proper divisors (1079433290).

2136561766 is a wasteful number, since it uses less digits than its factorization.

2136561766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3783.

The product of its digits is 272160, while the sum is 43.

The square root of 2136561766 is about 46222.9571317111. The cubic root of 2136561766 is about 1287.9682308143.

The spelling of 2136561766 in words is "two billion, one hundred thirty-six million, five hundred sixty-one thousand, seven hundred sixty-six".