673734827520 has 200 divisors, whose sum is σ = 2413106013384. Its totient is φ = 179662565376.

The previous prime is 673734827489. The next prime is 673734827537. The reversal of 673734827520 is 25728437376.

673734827520 is a `hidden beast` number, since 6 + 7 + 3 + 7 + 34 + 82 + 7 + 520 = 666.

673734827520 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1417194 + ... + 1831913.

Almost surely, 2^673734827520 is an apocalyptic number.

673734827520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

673734827520 is an abundant number, since it is smaller than the sum of its proper divisors (1739371185864).

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

673734827520 is an equidigital number, since it uses as much as digits as its factorization.

673734827520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3249142 (or 3249117 counting only the distinct ones).

The product of its (nonzero) digits is 11854080, while the sum is 54.

The spelling of 673734827520 in words is "six hundred seventy-three billion, seven hundred thirty-four million, eight hundred twenty-seven thousand, five hundred twenty".