2749581645 has 16 divisors (see below), whose sum is σ = 4402728000. Its totient is φ = 1465311104.

The previous prime is 2749581613. The next prime is 2749581689. The reversal of 2749581645 is 5461859472.

2749581645 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 2749581645 - 2⁵ = 2749581613 is a prime.

It is a super-3 number, since 3×2749581645³ (a number of 29 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50520 + ... + 89729.

It is an arithmetic number, because the mean of its divisors is an integer number (275170500).

Almost surely, 2^2749581645 is an apocalyptic number.

It is an amenable number.

2749581645 is a deficient number, since it is larger than the sum of its proper divisors (1653146355).

2749581645 is a wasteful number, since it uses less digits than its factorization.

2749581645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141564.

The product of its digits is 2419200, while the sum is 51.

The square root of 2749581645 is about 52436.4533983754. The cubic root of 2749581645 is about 1400.9486164420.

The spelling of 2749581645 in words is "two billion, seven hundred forty-nine million, five hundred eighty-one thousand, six hundred forty-five".