42471273661 has 4 divisors (see below), whose sum is σ = 43008884800. Its totient is φ = 41933662524.

The previous prime is 42471273659. The next prime is 42471273673. The reversal of 42471273661 is 16637217424.

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 42471273661 - 2¹ = 42471273659 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 (42471273631) 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, 268805451 + ... + 268805608.

It is an arithmetic number, because the mean of its divisors is an integer number (10752221200).

Almost surely, 2^42471273661 is an apocalyptic number.

It is an amenable number.

42471273661 is a deficient number, since it is larger than the sum of its proper divisors (537611139).

42471273661 is an equidigital number, since it uses as much as digits as its factorization.

42471273661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537611138.

The product of its digits is 338688, while the sum is 43.

The spelling of 42471273661 in words is "forty-two billion, four hundred seventy-one million, two hundred seventy-three thousand, six hundred sixty-one".