1561560523113 has 4 divisors (see below), whose sum is σ = 2082080697488. Its totient is φ = 1041040348740.

The previous prime is 1561560523099. The next prime is 1561560523121. The reversal of 1561560523113 is 3113250651651.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1561560523113 - 2⁹ = 1561560522601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1561560523213) 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, 260260087183 + ... + 260260087188.

It is an arithmetic number, because the mean of its divisors is an integer number (520520174372).

Almost surely, 2^{1561560523113} is an apocalyptic number.

It is an amenable number.

1561560523113 is a deficient number, since it is larger than the sum of its proper divisors (520520174375).

1561560523113 is an equidigital number, since it uses as much as digits as its factorization.

1561560523113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520520174374.

The product of its (nonzero) digits is 81000, while the sum is 39.

The spelling of 1561560523113 in words is "one trillion, five hundred sixty-one billion, five hundred sixty million, five hundred twenty-three thousand, one hundred thirteen".