561730535548 has 96 divisors (see below), whose sum is σ = 1230811158528. Its totient is φ = 218394316800.

The previous prime is 561730535537. The next prime is 561730535557. The reversal of 561730535548 is 845535037165.

561730535548 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a junction number, because it is equal to n+sod(n) for n = 561730535495 and 561730535504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10484508 + ... + 10537948.

It is an arithmetic number, because the mean of its divisors is an integer number (12820949568).

Almost surely, 2^561730535548 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 561730535548, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (615405579264).

561730535548 is an abundant number, since it is smaller than the sum of its proper divisors (669080622980).

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

561730535548 is a wasteful number, since it uses less digits than its factorization.

561730535548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53963 (or 53961 counting only the distinct ones).

The product of its (nonzero) digits is 7560000, while the sum is 52.

The spelling of 561730535548 in words is "five hundred sixty-one billion, seven hundred thirty million, five hundred thirty-five thousand, five hundred forty-eight".