561255343642 has 32 divisors (see below), whose sum is σ = 973963468800. Its totient is φ = 237586447728.

The previous prime is 561255343619. The next prime is 561255343669. The reversal of 561255343642 is 246343552165.

It is a junction number, because it is equal to n+sod(n) for n = 561255343592 and 561255343601.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5338459 + ... + 5442577.

It is an arithmetic number, because the mean of its divisors is an integer number (30436358400).

Almost surely, 2^561255343642 is an apocalyptic number.

561255343642 is a deficient number, since it is larger than the sum of its proper divisors (412708125158).

561255343642 is a wasteful number, since it uses less digits than its factorization.

561255343642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108850.

The product of its digits is 2592000, while the sum is 46.

The spelling of 561255343642 in words is "five hundred sixty-one billion, two hundred fifty-five million, three hundred forty-three thousand, six hundred forty-two".