673403956605 has 24 divisors (see below), whose sum is σ = 1167946684632. Its totient is φ = 358929343104.

The previous prime is 673403956601. The next prime is 673403956613. The reversal of 673403956605 is 506659304376.

673403956605 is a `hidden beast` number, since 6 + 7 + 3 + 40 + 39 + 566 + 0 + 5 = 666.

673403956605 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 685758969 + 672718197636 = 26187^2 + 820194^2 .

It is not a de Polignac number, because 673403956605 - 2² = 673403956601 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (673403956601) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4497054 + ... + 4644383.

It is an arithmetic number, because the mean of its divisors is an integer number (48664445193).

Almost surely, 2^673403956605 is an apocalyptic number.

It is an amenable number.

673403956605 is a deficient number, since it is larger than the sum of its proper divisors (494542728027).

673403956605 is a wasteful number, since it uses less digits than its factorization.

673403956605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9143085 (or 9143082 counting only the distinct ones).

The product of its (nonzero) digits is 12247200, while the sum is 54.

The spelling of 673403956605 in words is "six hundred seventy-three billion, four hundred three million, nine hundred fifty-six thousand, six hundred five".