561729570072 has 64 divisors (see below), whose sum is σ = 1581408783360. Its totient is φ = 164730076800.

The previous prime is 561729570037. The next prime is 561729570091. The reversal of 561729570072 is 270075927165.

It is a junction number, because it is equal to n+sod(n) for n = 561729569997 and 561729570024.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34310583 + ... + 34326950.

It is an arithmetic number, because the mean of its divisors is an integer number (24709512240).

Almost surely, 2^561729570072 is an apocalyptic number.

It is an amenable number.

561729570072 is an abundant number, since it is smaller than the sum of its proper divisors (1019679213288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

561729570072 is a wasteful number, since it uses less digits than its factorization.

561729570072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68637584 (or 68637580 counting only the distinct ones).

The product of its (nonzero) digits is 1852200, while the sum is 51.

The spelling of 561729570072 in words is "five hundred sixty-one billion, seven hundred twenty-nine million, five hundred seventy thousand, seventy-two".