2161640152255 has 32 divisors (see below), whose sum is σ = 2778051168000. Its totient is φ = 1611769485312.

The previous prime is 2161640152253. The next prime is 2161640152337. The reversal of 2161640152255 is 5522510461612.

It is a cyclic number.

It is not a de Polignac number, because 2161640152255 - 2¹ = 2161640152253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161640152253) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1675030 + ... + 2670019.

It is an arithmetic number, because the mean of its divisors is an integer number (86814099000).

Almost surely, 2^{2161640152255} is an apocalyptic number.

2161640152255 is a deficient number, since it is larger than the sum of its proper divisors (616411015745).

2161640152255 is a wasteful number, since it uses less digits than its factorization.

2161640152255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4345203.

The product of its (nonzero) digits is 144000, while the sum is 40.

The spelling of 2161640152255 in words is "two trillion, one hundred sixty-one billion, six hundred forty million, one hundred fifty-two thousand, two hundred fifty-five".