399552023543 has 24 divisors (see below), whose sum is σ = 429699150720. Its totient is φ = 371056412160.

The previous prime is 399552023539. The next prime is 399552023551. The reversal of 399552023543 is 345320255993.

It is not a de Polignac number, because 399552023543 - 2² = 399552023539 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 399552023491 and 399552023500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399552023513) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3033563 + ... + 3162531.

It is an arithmetic number, because the mean of its divisors is an integer number (17904131280).

Almost surely, 2^399552023543 is an apocalyptic number.

399552023543 is a deficient number, since it is larger than the sum of its proper divisors (30147127177).

399552023543 is a wasteful number, since it uses less digits than its factorization.

399552023543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129147 (or 129110 counting only the distinct ones).

The product of its (nonzero) digits is 4374000, while the sum is 50.

The spelling of 399552023543 in words is "three hundred ninety-nine billion, five hundred fifty-two million, twenty-three thousand, five hundred forty-three".