542400112561 has 4 divisors (see below), whose sum is σ = 542430185472. Its totient is φ = 542370039652.

The previous prime is 542400112549. The next prime is 542400112589. The reversal of 542400112561 is 165211004245.

It is a happy number.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-542400112561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (542400112861) 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, 15009385 + ... + 15045478.

It is an arithmetic number, because the mean of its divisors is an integer number (135607546368).

Almost surely, 2^542400112561 is an apocalyptic number.

It is an amenable number.

542400112561 is a deficient number, since it is larger than the sum of its proper divisors (30072911).

542400112561 is a wasteful number, since it uses less digits than its factorization.

542400112561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30072910.

The product of its (nonzero) digits is 9600, while the sum is 31.

The spelling of 542400112561 in words is "five hundred forty-two billion, four hundred million, one hundred twelve thousand, five hundred sixty-one".