442161761461 has 4 divisors (see below), whose sum is σ = 505327727392. Its totient is φ = 378995795532.

The previous prime is 442161761441. The next prime is 442161761467. The reversal of 442161761461 is 164167161244.

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 not a de Polignac number, because 442161761461 - 2⁹ = 442161760949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442161761467) 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, 31582982955 + ... + 31582982968.

It is an arithmetic number, because the mean of its divisors is an integer number (126331931848).

Almost surely, 2^442161761461 is an apocalyptic number.

It is an amenable number.

442161761461 is a deficient number, since it is larger than the sum of its proper divisors (63165965931).

442161761461 is an equidigital number, since it uses as much as digits as its factorization.

442161761461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63165965930.

The product of its digits is 193536, while the sum is 43.

The spelling of 442161761461 in words is "four hundred forty-two billion, one hundred sixty-one million, seven hundred sixty-one thousand, four hundred sixty-one".