561554380 has 12 divisors (see below), whose sum is σ = 1179264240. Its totient is φ = 224621744.

The previous prime is 561554377. The next prime is 561554381. The reversal of 561554380 is 83455165.

It is not an unprimeable number, because it can be changed into a prime (561554381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14038840 + ... + 14038879.

It is an arithmetic number, because the mean of its divisors is an integer number (98272020).

Almost surely, 2^561554380 is an apocalyptic number.

It is an amenable number.

561554380 is an abundant number, since it is smaller than the sum of its proper divisors (617709860).

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

561554380 is a wasteful number, since it uses less digits than its factorization.

561554380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28077728 (or 28077726 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 37.

The square root of 561554380 is about 23697.1386458365. The cubic root of 561554380 is about 825.0189796674.

It can be divided in two parts, 5615 and 54380, that added together give a palindrome (59995).

The spelling of 561554380 in words is "five hundred sixty-one million, five hundred fifty-four thousand, three hundred eighty".