4023891656550 has 72 divisors (see below), whose sum is σ = 10811102274336. Its totient is φ = 1073013289920.

The previous prime is 4023891656549. The next prime is 4023891656563. The reversal of 4023891656550 is 556561983204.

4023891656550 is a `hidden beast` number, since 4 + 0 + 2 + 3 + 89 + 1 + 6 + 5 + 6 + 550 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 28606992 + ... + 28747308.

Almost surely, 2^{4023891656550} is an apocalyptic number.

4023891656550 is an abundant number, since it is smaller than the sum of its proper divisors (6787210617786).

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

4023891656550 is a wasteful number, since it uses less digits than its factorization.

4023891656550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204062 (or 204054 counting only the distinct ones).

The product of its (nonzero) digits is 7776000, while the sum is 54.

The spelling of 4023891656550 in words is "four trillion, twenty-three billion, eight hundred ninety-one million, six hundred fifty-six thousand, five hundred fifty".