2178763516 has 36 divisors (see below), whose sum is σ = 4064187960. Its totient is φ = 1021759200.

The previous prime is 2178763511. The next prime is 2178763519. The reversal of 2178763516 is 6153678712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2178763511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 138375 + ... + 153313.

It is an arithmetic number, because the mean of its divisors is an integer number (112894110).

Almost surely, 2^2178763516 is an apocalyptic number.

It is an amenable number.

2178763516 is a deficient number, since it is larger than the sum of its proper divisors (1885424444).

2178763516 is a wasteful number, since it uses less digits than its factorization.

2178763516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15082 (or 15061 counting only the distinct ones).

The product of its digits is 423360, while the sum is 46.

The square root of 2178763516 is about 46677.2269527657. The cubic root of 2178763516 is about 1296.3930619166.

The spelling of 2178763516 in words is "two billion, one hundred seventy-eight million, seven hundred sixty-three thousand, five hundred sixteen".