673537000208 has 10 divisors (see below), whose sum is σ = 1304977937934. Its totient is φ = 336768500096.

The previous prime is 673537000153. The next prime is 673537000237. The reversal of 673537000208 is 802000735376.

It can be written as a sum of positive squares in only one way, i.e., 500454375184 + 173082625024 = 707428^2 + 416032^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21048031241 + ... + 21048031272.

Almost surely, 2^673537000208 is an apocalyptic number.

It is an amenable number.

673537000208 is a deficient number, since it is larger than the sum of its proper divisors (631440937726).

673537000208 is a wasteful number, since it uses less digits than its factorization.

673537000208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42096062521 (or 42096062515 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 41.

Adding to 673537000208 its sum of digits (41), we get a square (673537000249 = 820693²).

The spelling of 673537000208 in words is "six hundred seventy-three billion, five hundred thirty-seven million, two hundred eight", and thus it is an aban number.