44643946418 has 4 divisors (see below), whose sum is σ = 66965919630. Its totient is φ = 22321973208.

The previous prime is 44643946409. The next prime is 44643946471. The reversal of 44643946418 is 81464934644.

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., 39769532929 + 4874413489 = 199423^2 + 69817^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 44643946418.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11160986603 + ... + 11160986606.

Almost surely, 2^44643946418 is an apocalyptic number.

44643946418 is a deficient number, since it is larger than the sum of its proper divisors (22321973212).

44643946418 is a wasteful number, since it uses less digits than its factorization.

44643946418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22321973211.

The product of its digits is 7962624, while the sum is 53.

The spelling of 44643946418 in words is "forty-four billion, six hundred forty-three million, nine hundred forty-six thousand, four hundred eighteen".