561620700 has 108 divisors (see below), whose sum is σ = 1768767000. Its totient is φ = 149051520.

The previous prime is 561620681. The next prime is 561620723. The reversal of 561620700 is 7026165.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 202926 + ... + 205674.

Almost surely, 2^561620700 is an apocalyptic number.

561620700 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 561620700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (884383500).

561620700 is an abundant number, since it is smaller than the sum of its proper divisors (1207146300).

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

561620700 is a wasteful number, since it uses less digits than its factorization.

561620700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2996 (or 2986 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 561620700 is about 23698.5379295854. The cubic root of 561620700 is about 825.0514568456.

Adding to 561620700 its reverse (7026165), we get a palindrome (568646865).

The spelling of 561620700 in words is "five hundred sixty-one million, six hundred twenty thousand, seven hundred".