42645712573 has 4 divisors (see below), whose sum is σ = 42646134460. Its totient is φ = 42645290688.

The previous prime is 42645712567. The next prime is 42645712583. The reversal of 42645712573 is 37521754624.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 30463513444 + 12182199129 = 174538^2 + 110373^2 .

It is a cyclic number.

It is not a de Polignac number, because 42645712573 - 2³³ = 34055777981 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 (42645712523) 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, 40933 + ... + 294901.

It is an arithmetic number, because the mean of its divisors is an integer number (10661533615).

Almost surely, 2^42645712573 is an apocalyptic number.

It is an amenable number.

42645712573 is a deficient number, since it is larger than the sum of its proper divisors (421887).

42645712573 is a wasteful number, since it uses less digits than its factorization.

42645712573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421886.

The product of its digits is 1411200, while the sum is 46.

The spelling of 42645712573 in words is "forty-two billion, six hundred forty-five million, seven hundred twelve thousand, five hundred seventy-three".