561423420554 has 4 divisors (see below), whose sum is σ = 842135130834. Its totient is φ = 280711710276.

The previous prime is 561423420553. The next prime is 561423420589. The reversal of 561423420554 is 455024324165.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 482014998529 + 79408422025 = 694273^2 + 281795^2 .

It is not an unprimeable number, because it can be changed into a prime (561423420553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140355855137 + ... + 140355855140.

Almost surely, 2^561423420554 is an apocalyptic number.

561423420554 is a deficient number, since it is larger than the sum of its proper divisors (280711710280).

561423420554 is a wasteful number, since it uses less digits than its factorization.

561423420554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280711710279.

The product of its (nonzero) digits is 576000, while the sum is 41.

The spelling of 561423420554 in words is "five hundred sixty-one billion, four hundred twenty-three million, four hundred twenty thousand, five hundred fifty-four".