74423999646 has 24 divisors (see below), whose sum is σ = 161289179064. Its totient is φ = 24802279920.

The previous prime is 74423999603. The next prime is 74423999659. The reversal of 74423999646 is 64699932447.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 396060 + ... + 552911.

It is an arithmetic number, because the mean of its divisors is an integer number (6720382461).

Almost surely, 2^74423999646 is an apocalyptic number.

74423999646 is an abundant number, since it is smaller than the sum of its proper divisors (86865179418).

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

74423999646 is a wasteful number, since it uses less digits than its factorization.

74423999646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 953336 (or 953333 counting only the distinct ones).

The product of its digits is 70543872, while the sum is 63.

The spelling of 74423999646 in words is "seventy-four billion, four hundred twenty-three million, nine hundred ninety-nine thousand, six hundred forty-six".