561725987123 has 16 divisors (see below), whose sum is σ = 665023051776. Its totient is φ = 464301313920.

The previous prime is 561725987117. The next prime is 561725987129. The reversal of 561725987123 is 321789527165.

It is an interprime number because it is at equal distance from previous prime (561725987117) and next prime (561725987129).

It is a cyclic number.

It is not a de Polignac number, because 561725987123 - 2⁶ = 561725987059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561725987129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4512086 + ... + 4634907.

It is an arithmetic number, because the mean of its divisors is an integer number (41563940736).

Almost surely, 2^561725987123 is an apocalyptic number.

561725987123 is a deficient number, since it is larger than the sum of its proper divisors (103297064653).

561725987123 is a wasteful number, since it uses less digits than its factorization.

561725987123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9147314.

The product of its digits is 6350400, while the sum is 56.

The spelling of 561725987123 in words is "five hundred sixty-one billion, seven hundred twenty-five million, nine hundred eighty-seven thousand, one hundred twenty-three".