561166421336 has 8 divisors (see below), whose sum is σ = 1052187040020. Its totient is φ = 280583210664.

The previous prime is 561166421329. The next prime is 561166421393. The reversal of 561166421336 is 633124661165.

It is a tau number, because it is divible by the number of its divisors (8).

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, 35072901326 + ... + 35072901341.

Almost surely, 2^561166421336 is an apocalyptic number.

It is an amenable number.

561166421336 is a deficient number, since it is larger than the sum of its proper divisors (491020618684).

561166421336 is a wasteful number, since it uses less digits than its factorization.

561166421336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70145802673 (or 70145802669 counting only the distinct ones).

The product of its digits is 466560, while the sum is 44.

The spelling of 561166421336 in words is "five hundred sixty-one billion, one hundred sixty-six million, four hundred twenty-one thousand, three hundred thirty-six".