561355654 has 4 divisors (see below), whose sum is σ = 842033484. Its totient is φ = 280677826.

The previous prime is 561355649. The next prime is 561355661. The reversal of 561355654 is 456553165.

561355654 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140338912 + ... + 140338915.

It is an arithmetic number, because the mean of its divisors is an integer number (210508371).

Almost surely, 2^561355654 is an apocalyptic number.

561355654 is a deficient number, since it is larger than the sum of its proper divisors (280677830).

561355654 is a wasteful number, since it uses less digits than its factorization.

561355654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280677829.

The product of its digits is 270000, while the sum is 40.

The square root of 561355654 is about 23692.9452369265. The cubic root of 561355654 is about 824.9216474104.

The spelling of 561355654 in words is "five hundred sixty-one million, three hundred fifty-five thousand, six hundred fifty-four".