2780216652 has 24 divisors (see below), whose sum is σ = 6868771056. Its totient is φ = 872224768.

The previous prime is 2780216641. The next prime is 2780216671. The reversal of 2780216652 is 2566120872.

It is a self number, because there is not a number n which added to its sum of digits gives 2780216652.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6814053 + ... + 6814460.

It is an arithmetic number, because the mean of its divisors is an integer number (286198794).

Almost surely, 2^2780216652 is an apocalyptic number.

It is an amenable number.

2780216652 is an abundant number, since it is smaller than the sum of its proper divisors (4088554404).

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

2780216652 is a wasteful number, since it uses less digits than its factorization.

2780216652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13628537 (or 13628535 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 2780216652 is about 52727.7597855247. The cubic root of 2780216652 is about 1406.1323937282.

The spelling of 2780216652 in words is "two billion, seven hundred eighty million, two hundred sixteen thousand, six hundred fifty-two".