561606510550 has 48 divisors (see below), whose sum is σ = 1079080827264. Its totient is φ = 217235520000.

The previous prime is 561606510541. The next prime is 561606510599. The reversal of 561606510550 is 55015606165.

It is a super-2 number, since 2×561606510550² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1976440 + ... + 2242660.

It is an arithmetic number, because the mean of its divisors is an integer number (22480850568).

Almost surely, 2^561606510550 is an apocalyptic number.

561606510550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

561606510550 is a deficient number, since it is larger than the sum of its proper divisors (517474316714).

561606510550 is a wasteful number, since it uses less digits than its factorization.

561606510550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267625 (or 267620 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 40.

The spelling of 561606510550 in words is "five hundred sixty-one billion, six hundred six million, five hundred ten thousand, five hundred fifty".