561281971456 has 36 divisors (see below), whose sum is σ = 1121863658944. Its totient is φ = 280267200000.

The previous prime is 561281971451. The next prime is 561281971483. The reversal of 561281971456 is 654179182165.

It is a junction number, because it is equal to n+sod(n) for n = 561281971397 and 561281971406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561281971451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1267470 + ... + 1651981.

Almost surely, 2^561281971456 is an apocalyptic number.

It is an amenable number.

561281971456 is a deficient number, since it is larger than the sum of its proper divisors (560581687488).

561281971456 is an equidigital number, since it uses as much as digits as its factorization.

561281971456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2920218 (or 2920204 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 55.

The spelling of 561281971456 in words is "five hundred sixty-one billion, two hundred eighty-one million, nine hundred seventy-one thousand, four hundred fifty-six".