2781120646 has 8 divisors (see below), whose sum is σ = 4179014280. Its totient is φ = 1388115888.

The previous prime is 2781120637. The next prime is 2781120689. The reversal of 2781120646 is 6460211872.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×2781120646³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1220796 + ... + 1223071.

It is an arithmetic number, because the mean of its divisors is an integer number (522376785).

Almost surely, 2^2781120646 is an apocalyptic number.

2781120646 is a deficient number, since it is larger than the sum of its proper divisors (1397893634).

2781120646 is a wasteful number, since it uses less digits than its factorization.

2781120646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2444438.

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

The square root of 2781120646 is about 52736.3313665257. The cubic root of 2781120646 is about 1406.2847796343.

The spelling of 2781120646 in words is "two billion, seven hundred eighty-one million, one hundred twenty thousand, six hundred forty-six".