61560003643 has 4 divisors (see below), whose sum is σ = 61817577120. Its totient is φ = 61302430168.

The previous prime is 61560003619. The next prime is 61560003647. The reversal of 61560003643 is 34630006516.

61560003643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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-61560003643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61560003599 and 61560003608.

It is not an unprimeable number, because it can be changed into a prime (61560003647) 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, 128786380 + ... + 128786857.

It is an arithmetic number, because the mean of its divisors is an integer number (15454394280).

Almost surely, 2^61560003643 is an apocalyptic number.

61560003643 is a deficient number, since it is larger than the sum of its proper divisors (257573477).

61560003643 is a wasteful number, since it uses less digits than its factorization.

61560003643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257573476.

The product of its (nonzero) digits is 38880, while the sum is 34.

The spelling of 61560003643 in words is "sixty-one billion, five hundred sixty million, three thousand, six hundred forty-three".