61564000543 has 4 divisors (see below), whose sum is σ = 61741418760. Its totient is φ = 61386582328.

The previous prime is 61564000451. The next prime is 61564000567. The reversal of 61564000543 is 34500046516.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61564000543 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61564000499 and 61564000508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61564000843) 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, 88708588 + ... + 88709281.

It is an arithmetic number, because the mean of its divisors is an integer number (15435354690).

Almost surely, 2^61564000543 is an apocalyptic number.

61564000543 is a deficient number, since it is larger than the sum of its proper divisors (177418217).

61564000543 is a wasteful number, since it uses less digits than its factorization.

61564000543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177418216.

The product of its (nonzero) digits is 43200, while the sum is 34.

The spelling of 61564000543 in words is "sixty-one billion, five hundred sixty-four million, five hundred forty-three", and thus it is an aban number.