3645781255 has 12 divisors (see below), whose sum is σ = 4531004712. Its totient is φ = 2816048480.

The previous prime is 3645781219. The next prime is 3645781301. The reversal of 3645781255 is 5521875463.

3645781255 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-3645781255 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 429301 + ... + 437710.

It is an arithmetic number, because the mean of its divisors is an integer number (377583726).

Almost surely, 2^3645781255 is an apocalyptic number.

3645781255 is a deficient number, since it is larger than the sum of its proper divisors (885223457).

3645781255 is an equidigital number, since it uses as much as digits as its factorization.

3645781255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 867074 (or 867045 counting only the distinct ones).

The product of its digits is 1008000, while the sum is 46.

The square root of 3645781255 is about 60380.3051913453. The cubic root of 3645781255 is about 1539.0882970151.

The spelling of 3645781255 in words is "three billion, six hundred forty-five million, seven hundred eighty-one thousand, two hundred fifty-five".