43661628634 has 16 divisors (see below), whose sum is σ = 72030970368. Its totient is φ = 19722764592.

The previous prime is 43661628613. The next prime is 43661628643. The reversal of 43661628634 is 43682616634.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17863602 + ... + 17866045.

It is an arithmetic number, because the mean of its divisors is an integer number (4501935648).

Almost surely, 2^43661628634 is an apocalyptic number.

43661628634 is a deficient number, since it is larger than the sum of its proper divisors (28369341734).

43661628634 is a wasteful number, since it uses less digits than its factorization.

43661628634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35729709.

The product of its digits is 2985984, while the sum is 49.

The spelling of 43661628634 in words is "forty-three billion, six hundred sixty-one million, six hundred twenty-eight thousand, six hundred thirty-four".