561632663456 has 12 divisors (see below), whose sum is σ = 1105714306242. Its totient is φ = 280816331712.

The previous prime is 561632663357. The next prime is 561632663461. The reversal of 561632663456 is 654366236165.

It can be written as a sum of positive squares in only one way, i.e., 542161251856 + 19471411600 = 736316^2 + 139540^2 .

It is a junction number, because it is equal to n+sod(n) for n = 561632663398 and 561632663407.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8775510335 + ... + 8775510398.

Almost surely, 2^561632663456 is an apocalyptic number.

It is an amenable number.

561632663456 is a deficient number, since it is larger than the sum of its proper divisors (544081642786).

561632663456 is a wasteful number, since it uses less digits than its factorization.

561632663456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17551020743 (or 17551020735 counting only the distinct ones).

The product of its digits is 13996800, while the sum is 53.

The spelling of 561632663456 in words is "five hundred sixty-one billion, six hundred thirty-two million, six hundred sixty-three thousand, four hundred fifty-six".