2685754781 has 16 divisors (see below), whose sum is σ = 2907767808. Its totient is φ = 2473363200.

The previous prime is 2685754769. The next prime is 2685754783. The reversal of 2685754781 is 1874575862.

It is a cyclic number.

It is not a de Polignac number, because 2685754781 - 2⁶ = 2685754717 is a prime.

It is a super-2 number, since 2×2685754781² = 14426557487328715922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2685754783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130901 + ... + 150021.

It is an arithmetic number, because the mean of its divisors is an integer number (181735488).

Almost surely, 2^2685754781 is an apocalyptic number.

It is an amenable number.

2685754781 is a deficient number, since it is larger than the sum of its proper divisors (222013027).

2685754781 is a wasteful number, since it uses less digits than its factorization.

2685754781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19372.

The product of its digits is 3763200, while the sum is 53.

The square root of 2685754781 is about 51824.2682630445. The cubic root of 2685754781 is about 1390.0234250663.

The spelling of 2685754781 in words is "two billion, six hundred eighty-five million, seven hundred fifty-four thousand, seven hundred eighty-one".