663424134550 has 24 divisors (see below), whose sum is σ = 1245289716000. Its totient is φ = 262935067680.

The previous prime is 663424134533. The next prime is 663424134587. The reversal of 663424134550 is 55431424366.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 663424134497 and 663424134506.

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, 60859150 + ... + 60870049.

It is an arithmetic number, because the mean of its divisors is an integer number (51887071500).

Almost surely, 2^663424134550 is an apocalyptic number.

663424134550 is a deficient number, since it is larger than the sum of its proper divisors (581865581450).

663424134550 is a wasteful number, since it uses less digits than its factorization.

663424134550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121729320 (or 121729315 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 43.

The spelling of 663424134550 in words is "six hundred sixty-three billion, four hundred twenty-four million, one hundred thirty-four thousand, five hundred fifty".