561816699000 has 128 divisors (see below), whose sum is σ = 1829079982080. Its totient is φ = 143303952000.

The previous prime is 561816698999. The next prime is 561816699043. The reversal of 561816699000 is 996618165.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4002136 + ... + 4140135.

It is an arithmetic number, because the mean of its divisors is an integer number (14289687360).

Almost surely, 2^561816699000 is an apocalyptic number.

561816699000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

561816699000 is an abundant number, since it is smaller than the sum of its proper divisors (1267263283080).

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

561816699000 is a wasteful number, since it uses less digits than its factorization.

561816699000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8142318 (or 8142304 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 51.

The spelling of 561816699000 in words is "five hundred sixty-one billion, eight hundred sixteen million, six hundred ninety-nine thousand".