2681999745 has 8 divisors (see below), whose sum is σ = 4291199616. Its totient is φ = 1430399856.

The previous prime is 2681999731. The next prime is 2681999759. The reversal of 2681999745 is 5479991862.

It is an interprime number because it is at equal distance from previous prime (2681999731) and next prime (2681999759).

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

It is not a de Polignac number, because 2681999745 - 2¹⁵ = 2681966977 is a prime.

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, 89399977 + ... + 89400006.

It is an arithmetic number, because the mean of its divisors is an integer number (536399952).

Almost surely, 2^2681999745 is an apocalyptic number.

It is an amenable number.

2681999745 is a deficient number, since it is larger than the sum of its proper divisors (1609199871).

2681999745 is a wasteful number, since it uses less digits than its factorization.

2681999745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178799991.

The product of its digits is 9797760, while the sum is 60.

The square root of 2681999745 is about 51788.0270429373. The cubic root of 2681999745 is about 1389.3753114850.

The spelling of 2681999745 in words is "two billion, six hundred eighty-one million, nine hundred ninety-nine thousand, seven hundred forty-five".