2781081415 has 32 divisors (see below), whose sum is σ = 3942328320. Its totient is φ = 1843874304.

The previous prime is 2781081397. The next prime is 2781081419. The reversal of 2781081415 is 5141801872.

It is a cyclic number.

It is not a de Polignac number, because 2781081415 - 2⁵ = 2781081383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2781081419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 126351 + ... + 146719.

It is an arithmetic number, because the mean of its divisors is an integer number (123197760).

Almost surely, 2^2781081415 is an apocalyptic number.

2781081415 is a deficient number, since it is larger than the sum of its proper divisors (1161246905).

2781081415 is a wasteful number, since it uses less digits than its factorization.

2781081415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20511.

The product of its (nonzero) digits is 17920, while the sum is 37.

The square root of 2781081415 is about 52735.9594110129. The cubic root of 2781081415 is about 1406.2781671658.

The spelling of 2781081415 in words is "two billion, seven hundred eighty-one million, eighty-one thousand, four hundred fifteen".