2166155480 has 32 divisors (see below), whose sum is σ = 4877366400. Its totient is φ = 865837056.

The previous prime is 2166155471. The next prime is 2166155503. The reversal of 2166155480 is 845516612.

It is a happy number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 38744 + ... + 76376.

It is an arithmetic number, because the mean of its divisors is an integer number (152417700).

Almost surely, 2^2166155480 is an apocalyptic number.

2166155480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2166155480 is an abundant number, since it is smaller than the sum of its proper divisors (2711210920).

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

2166155480 is a wasteful number, since it uses less digits than its factorization.

2166155480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39083 (or 39079 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 38.

The square root of 2166155480 is about 46541.9754630162. The cubic root of 2166155480 is about 1293.8875734743.

The spelling of 2166155480 in words is "two billion, one hundred sixty-six million, one hundred fifty-five thousand, four hundred eighty".