2178871560 has 48 divisors (see below), whose sum is σ = 7081333740. Its totient is φ = 581032320.

The previous prime is 2178871559. The next prime is 2178871561. The reversal of 2178871560 is 651788712.

It is a happy number.

2178871560 is a `hidden beast` number, since 2 + 1 + 7 + 8 + 87 + 1 + 560 = 666.

It is an interprime number because it is at equal distance from previous prime (2178871559) and next prime (2178871561).

It can be written as a sum of positive squares in 2 ways, for example, as 2150547876 + 28323684 = 46374^2 + 5322^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (2178871561) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3025851 + ... + 3026570.

Almost surely, 2^2178871560 is an apocalyptic number.

2178871560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2178871560 is an abundant number, since it is smaller than the sum of its proper divisors (4902462180).

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

2178871560 is a wasteful number, since it uses less digits than its factorization.

2178871560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6052438 (or 6052431 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 45.

The square root of 2178871560 is about 46678.3842908042. The cubic root of 2178871560 is about 1296.4144907646.

The spelling of 2178871560 in words is "two billion, one hundred seventy-eight million, eight hundred seventy-one thousand, five hundred sixty".