2170778144 has 48 divisors (see below), whose sum is σ = 4529708568. Its totient is φ = 1020506112.

The previous prime is 2170778119. The next prime is 2170778179. The reversal of 2170778144 is 4418770712.

It can be written as a sum of positive squares in 4 ways, for example, as 1712304400 + 458473744 = 41380^2 + 21412^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 919814 + ... + 922170.

Almost surely, 2^2170778144 is an apocalyptic number.

It is an amenable number.

2170778144 is an abundant number, since it is smaller than the sum of its proper divisors (2358930424).

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

2170778144 is a wasteful number, since it uses less digits than its factorization.

2170778144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4077 (or 4069 counting only the distinct ones).

The product of its (nonzero) digits is 87808, while the sum is 41.

The square root of 2170778144 is about 46591.6102318862. The cubic root of 2170778144 is about 1294.8073224466.

The spelling of 2170778144 in words is "two billion, one hundred seventy million, seven hundred seventy-eight thousand, one hundred forty-four".