43626640285 has 4 divisors (see below), whose sum is σ = 52351968348. Its totient is φ = 34901312224.

The previous prime is 43626640273. The next prime is 43626640391. The reversal of 43626640285 is 58204662634.

43626640285 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58204662634 = 2 ⋅29102331317.

It can be written as a sum of positive squares in 2 ways, for example, as 9745243524 + 33881396761 = 98718^2 + 184069^2 .

It is a cyclic number.

It is not a de Polignac number, because 43626640285 - 2⁷ = 43626640157 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 3 ways as a sum of consecutive naturals, for example, 4362664024 + ... + 4362664033.

It is an arithmetic number, because the mean of its divisors is an integer number (13087992087).

Almost surely, 2^43626640285 is an apocalyptic number.

It is an amenable number.

43626640285 is a deficient number, since it is larger than the sum of its proper divisors (8725328063).

43626640285 is an equidigital number, since it uses as much as digits as its factorization.

43626640285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8725328062.

The product of its (nonzero) digits is 1658880, while the sum is 46.

The spelling of 43626640285 in words is "forty-three billion, six hundred twenty-six million, six hundred forty thousand, two hundred eighty-five".