43194644738 has 48 divisors (see below), whose sum is σ = 76516913088. Its totient is φ = 18230940000.

The previous prime is 43194644729. The next prime is 43194644813. The reversal of 43194644738 is 83744649134.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 43194644738.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7379513 + ... + 7385363.

It is an arithmetic number, because the mean of its divisors is an integer number (1594102356).

Almost surely, 2^43194644738 is an apocalyptic number.

43194644738 is a deficient number, since it is larger than the sum of its proper divisors (33322268350).

43194644738 is a wasteful number, since it uses less digits than its factorization.

43194644738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6999 (or 6992 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 53.

The spelling of 43194644738 in words is "forty-three billion, one hundred ninety-four million, six hundred forty-four thousand, seven hundred thirty-eight".