673316806554 has 128 divisors (see below), whose sum is σ = 1734632271360. Its totient is φ = 189609984000.

The previous prime is 673316806441. The next prime is 673316806583. The reversal of 673316806554 is 455608613376.

673316806554 is a `hidden beast` number, since 6 + 7 + 3 + 3 + 1 + 6 + 80 + 6 + 554 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 673316806554.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 44170374 + ... + 44185614.

It is an arithmetic number, because the mean of its divisors is an integer number (13551814620).

Almost surely, 2^673316806554 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 673316806554, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (867316135680).

673316806554 is an abundant number, since it is smaller than the sum of its proper divisors (1061315464806).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

673316806554 is a wasteful number, since it uses less digits than its factorization.

673316806554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16933 (or 16927 counting only the distinct ones).

The product of its (nonzero) digits is 10886400, while the sum is 54.

The spelling of 673316806554 in words is "six hundred seventy-three billion, three hundred sixteen million, eight hundred six thousand, five hundred fifty-four".