42531630322561 has 4 divisors (see below), whose sum is σ = 42531670196224. Its totient is φ = 42531590448900.

The previous prime is 42531630322513. The next prime is 42531630322607. The reversal of 42531630322561 is 16522303613524.

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 42531630322561 - 2²³ = 42531621933953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42531630322061) 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, 18291585 + ... + 20485246.

It is an arithmetic number, because the mean of its divisors is an integer number (10632917549056).

Almost surely, 2^{42531630322561} is an apocalyptic number.

It is an amenable number.

42531630322561 is a deficient number, since it is larger than the sum of its proper divisors (39873663).

42531630322561 is a wasteful number, since it uses less digits than its factorization.

42531630322561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39873662.

The product of its (nonzero) digits is 777600, while the sum is 43.

The spelling of 42531630322561 in words is "forty-two trillion, five hundred thirty-one billion, six hundred thirty million, three hundred twenty-two thousand, five hundred sixty-one".