561601550 has 12 divisors (see below), whose sum is σ = 1044578976. Its totient is φ = 224640600.

The previous prime is 561601519. The next prime is 561601583. The reversal of 561601550 is 55106165.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5615966 + ... + 5616065.

It is an arithmetic number, because the mean of its divisors is an integer number (87048248).

Almost surely, 2^561601550 is an apocalyptic number.

561601550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

561601550 is a deficient number, since it is larger than the sum of its proper divisors (482977426).

561601550 is a wasteful number, since it uses less digits than its factorization.

561601550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11232043 (or 11232038 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 561601550 is about 23698.1338927773. The cubic root of 561601550 is about 825.0420792740.

The spelling of 561601550 in words is "five hundred sixty-one million, six hundred one thousand, five hundred fifty".