2781642016 has 12 divisors (see below), whose sum is σ = 5476357782. Its totient is φ = 1390820992.

The previous prime is 2781642001. The next prime is 2781642043. The reversal of 2781642016 is 6102461872.

It can be written as a sum of positive squares in only one way, i.e., 2401392016 + 380250000 = 49004^2 + 19500^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43463125 + ... + 43463188.

Almost surely, 2^2781642016 is an apocalyptic number.

It is an amenable number.

2781642016 is a deficient number, since it is larger than the sum of its proper divisors (2694715766).

2781642016 is an equidigital number, since it uses as much as digits as its factorization.

2781642016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86926323 (or 86926315 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 2781642016 is about 52741.2743114916. The cubic root of 2781642016 is about 1406.3726517522.

The spelling of 2781642016 in words is "two billion, seven hundred eighty-one million, six hundred forty-two thousand, sixteen".