673389544537 has 4 divisors (see below), whose sum is σ = 673410506980. Its totient is φ = 673368582096.

The previous prime is 673389544507. The next prime is 673389544571. The reversal of 673389544537 is 735445983376.

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 524087675721 + 149301868816 = 723939^2 + 386396^2 .

It is a cyclic number.

It is not a de Polignac number, because 673389544537 - 2³¹ = 671242060889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (673389544507) 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, 10432962 + ... + 10497307.

It is an arithmetic number, because the mean of its divisors is an integer number (168352626745).

Almost surely, 2^673389544537 is an apocalyptic number.

It is an amenable number.

673389544537 is a deficient number, since it is larger than the sum of its proper divisors (20962443).

673389544537 is a wasteful number, since it uses less digits than its factorization.

673389544537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20962442.

The product of its digits is 228614400, while the sum is 64.

The spelling of 673389544537 in words is "six hundred seventy-three billion, three hundred eighty-nine million, five hundred forty-four thousand, five hundred thirty-seven".