2691705381 has 16 divisors (see below), whose sum is σ = 3600629760. Its totient is φ = 1788637680.

The previous prime is 2691705371. The next prime is 2691705389. The reversal of 2691705381 is 1835071962.

It is not a de Polignac number, because 2691705381 - 2¹⁰ = 2691704357 is a prime.

It is a super-2 number, since 2×2691705381² = 14490555716208710322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2691705389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2103900 + ... + 2105178.

It is an arithmetic number, because the mean of its divisors is an integer number (225039360).

Almost surely, 2^2691705381 is an apocalyptic number.

It is an amenable number.

2691705381 is a deficient number, since it is larger than the sum of its proper divisors (908924379).

2691705381 is a wasteful number, since it uses less digits than its factorization.

2691705381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3016.

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 2691705381 is about 51881.6478246403. The cubic root of 2691705381 is about 1391.0492536538.

The spelling of 2691705381 in words is "two billion, six hundred ninety-one million, seven hundred five thousand, three hundred eighty-one".