2190171660 has 48 divisors (see below), whose sum is σ = 6147187200. Its totient is φ = 582645184.

The previous prime is 2190171649. The next prime is 2190171671. The reversal of 2190171660 is 661710912.

It is an interprime number because it is at equal distance from previous prime (2190171649) and next prime (2190171671).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18420 + ... + 68699.

It is an arithmetic number, because the mean of its divisors is an integer number (128066400).

Almost surely, 2^2190171660 is an apocalyptic number.

2190171660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2190171660 is an abundant number, since it is smaller than the sum of its proper divisors (3957015540).

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

2190171660 is a wasteful number, since it uses less digits than its factorization.

2190171660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87550 (or 87548 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 33.

The square root of 2190171660 is about 46799.2698660994. The cubic root of 2190171660 is about 1298.6517896515.

The spelling of 2190171660 in words is "two billion, one hundred ninety million, one hundred seventy-one thousand, six hundred sixty".