40433621458 has 4 divisors (see below), whose sum is σ = 60650432190. Its totient is φ = 20216810728.

The previous prime is 40433621453. The next prime is 40433621471. The reversal of 40433621458 is 85412633404.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 29260497249 + 11173124209 = 171057^2 + 105703^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 40433621458.

It is not an unprimeable number, because it can be changed into a prime (40433621453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10108405363 + ... + 10108405366.

Almost surely, 2^40433621458 is an apocalyptic number.

40433621458 is a deficient number, since it is larger than the sum of its proper divisors (20216810732).

40433621458 is a wasteful number, since it uses less digits than its factorization.

40433621458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20216810731.

The product of its (nonzero) digits is 276480, while the sum is 40.

The spelling of 40433621458 in words is "forty billion, four hundred thirty-three million, six hundred twenty-one thousand, four hundred fifty-eight".