561061550 has 96 divisors (see below), whose sum is σ = 1244920320. Its totient is φ = 184060800.

The previous prime is 561061541. The next prime is 561061559. The reversal of 561061550 is 55160165.

561061550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (561061541) and next prime (561061559).

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561061559) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1694885 + ... + 1695215.

It is an arithmetic number, because the mean of its divisors is an integer number (12967920).

Almost surely, 2^561061550 is an apocalyptic number.

561061550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

561061550 is an abundant number, since it is smaller than the sum of its proper divisors (683858770).

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

561061550 is a wasteful number, since it uses less digits than its factorization.

561061550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546 (or 541 counting only the distinct ones).

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

The square root of 561061550 is about 23686.7378505357. The cubic root of 561061550 is about 824.7775586398. Note that the first 3 decimals are identical.

The spelling of 561061550 in words is "five hundred sixty-one million, sixty-one thousand, five hundred fifty".