673438339738 has 16 divisors (see below), whose sum is σ = 1018964328480. Its totient is φ = 333790894800.

The previous prime is 673438339709. The next prime is 673438339747. The reversal of 673438339738 is 837933834376.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 673438339738.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1648648 + ... + 2016163.

It is an arithmetic number, because the mean of its divisors is an integer number (63685270530).

Almost surely, 2^673438339738 is an apocalyptic number.

673438339738 is a deficient number, since it is larger than the sum of its proper divisors (345525988742).

673438339738 is a wasteful number, since it uses less digits than its factorization.

673438339738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3665613.

The product of its digits is 164602368, while the sum is 64.

It can be divided in two parts, 673438 and 339738, that added together give a triangular number (1013176 = T₁₄₂₃).

The spelling of 673438339738 in words is "six hundred seventy-three billion, four hundred thirty-eight million, three hundred thirty-nine thousand, seven hundred thirty-eight".