2161153636360 has 16 divisors (see below), whose sum is σ = 4862595681900. Its totient is φ = 864461454528.

The previous prime is 2161153636333. The next prime is 2161153636373. The reversal of 2161153636360 is 636363511612.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2052566251684 + 108587384676 = 1432678^2 + 329526^2 .

It is a super-2 number, since 2×2161153636360² (a number of 25 digits) contains 22 as substring.

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, 27014420415 + ... + 27014420494.

Almost surely, 2^{2161153636360} is an apocalyptic number.

2161153636360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2161153636360 is an abundant number, since it is smaller than the sum of its proper divisors (2701442045540).

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

2161153636360 is a wasteful number, since it uses less digits than its factorization.

2161153636360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54028840920 (or 54028840916 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 43.

The spelling of 2161153636360 in words is "two trillion, one hundred sixty-one billion, one hundred fifty-three million, six hundred thirty-six thousand, three hundred sixty".