43640644604634 has 128 divisors (see below), whose sum is σ = 121321807810560. Its totient is φ = 11296545249600.

The previous prime is 43640644604621. The next prime is 43640644604671.

43640644604634 is a `hidden beast` number, since 4 + 3 + 64 + 0 + 64 + 4 + 60 + 463 + 4 = 666.

43640644604634 is nontrivially palindromic in base 10.

43640644604634 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 16692262 + ... + 19128849.

It is an arithmetic number, because the mean of its divisors is an integer number (947826623520).

Almost surely, 2^{43640644604634} is an apocalyptic number.

43640644604634 is an abundant number, since it is smaller than the sum of its proper divisors (77681163205926).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

43640644604634 is a wasteful number, since it uses less digits than its factorization.

43640644604634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35821433 (or 35821427 counting only the distinct ones).

The product of its (nonzero) digits is 47775744, while the sum is 54.

It can be divided in two parts, 4364064 and 4604634, that added together give a palindrome (8968698).

The spelling of 43640644604634 in words is "forty-three trillion, six hundred forty billion, six hundred forty-four million, six hundred four thousand, six hundred thirty-four".