2781655441 has 4 divisors (see below), whose sum is σ = 2802889584. Its totient is φ = 2760421300.

The previous prime is 2781655427. The next prime is 2781655501. The reversal of 2781655441 is 1445561872.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2781655441 - 2⁷ = 2781655313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2781655421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10616875 + ... + 10617136.

It is an arithmetic number, because the mean of its divisors is an integer number (700722396).

Almost surely, 2^2781655441 is an apocalyptic number.

It is an amenable number.

2781655441 is a deficient number, since it is larger than the sum of its proper divisors (21234143).

2781655441 is a wasteful number, since it uses less digits than its factorization.

2781655441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21234142.

The product of its digits is 268800, while the sum is 43.

The square root of 2781655441 is about 52741.4015835757. The cubic root of 2781655441 is about 1406.3749142674.

The spelling of 2781655441 in words is "two billion, seven hundred eighty-one million, six hundred fifty-five thousand, four hundred forty-one".