643503614404 has 12 divisors (see below), whose sum is σ = 1287007228864. Its totient is φ = 275787263304.

The previous prime is 643503614401. The next prime is 643503614407. The reversal of 643503614404 is 404416305346.

It is an interprime number because it is at equal distance from previous prime (643503614401) and next prime (643503614407).

643503614404 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (643503614401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11491135944 + ... + 11491135999.

Almost surely, 2^643503614404 is an apocalyptic number.

It is an amenable number.

643503614404 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

643503614404 is a wasteful number, since it uses less digits than its factorization.

643503614404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22982271954 (or 22982271952 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 40.

The spelling of 643503614404 in words is "six hundred forty-three billion, five hundred three million, six hundred fourteen thousand, four hundred four".