2155216464170 has 64 divisors (see below), whose sum is σ = 4836922511616. Its totient is φ = 671716769280.

The previous prime is 2155216464169. The next prime is 2155216464187. The reversal of 2155216464170 is 714646125512.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15002804 + ... + 15145776.

It is an arithmetic number, because the mean of its divisors is an integer number (75576914244).

Almost surely, 2^{2155216464170} is an apocalyptic number.

2155216464170 is an abundant number, since it is smaller than the sum of its proper divisors (2681706047446).

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

2155216464170 is a wasteful number, since it uses less digits than its factorization.

2155216464170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162575.

The product of its (nonzero) digits is 403200, while the sum is 44.

The spelling of 2155216464170 in words is "two trillion, one hundred fifty-five billion, two hundred sixteen million, four hundred sixty-four thousand, one hundred seventy".