42667981356673 has 4 divisors (see below), whose sum is σ = 42669736037460. Its totient is φ = 42666226675888.

The previous prime is 42667981356601. The next prime is 42667981356677. The reversal of 42667981356673 is 37665318976624.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11667061141264 + 31000920215409 = 3415708^2 + 5567847^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42667981356673 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42667981356596 and 42667981356605.

It is not an unprimeable number, because it can be changed into a prime (42667981356677) 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, 877303918 + ... + 877352551.

It is an arithmetic number, because the mean of its divisors is an integer number (10667434009365).

Almost surely, 2^{42667981356673} is an apocalyptic number.

It is an amenable number.

42667981356673 is a deficient number, since it is larger than the sum of its proper divisors (1754680787).

42667981356673 is a wasteful number, since it uses less digits than its factorization.

42667981356673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1754680786.

The product of its digits is 1646023680, while the sum is 73.

The spelling of 42667981356673 in words is "forty-two trillion, six hundred sixty-seven billion, nine hundred eighty-one million, three hundred fifty-six thousand, six hundred seventy-three".