673406126856 has 48 divisors (see below), whose sum is σ = 1849495714560. Its totient is φ = 221307176160.

The previous prime is 673406126837. The next prime is 673406126857. The reversal of 673406126856 is 658621604376.

673406126856 is a `hidden beast` number, since 67 + 3 + 406 + 126 + 8 + 56 = 666.

It is not an unprimeable number, because it can be changed into a prime (673406126857) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65860120 + ... + 65870343.

It is an arithmetic number, because the mean of its divisors is an integer number (38531160720).

Almost surely, 2^673406126856 is an apocalyptic number.

It is an amenable number.

673406126856 is an abundant number, since it is smaller than the sum of its proper divisors (1176089587704).

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

673406126856 is a wasteful number, since it uses less digits than its factorization.

673406126856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131730546 (or 131730539 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 54.

The spelling of 673406126856 in words is "six hundred seventy-three billion, four hundred six million, one hundred twenty-six thousand, eight hundred fifty-six".