643473473960 has 64 divisors (see below), whose sum is σ = 1453269081600. Its totient is φ = 256421664256.

The previous prime is 643473473959. The next prime is 643473473971. The reversal of 643473473960 is 69374374346.

It is a happy number.

It is a super-2 number, since 2×643473473960² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 643473473896 and 643473473905.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11420177 + ... + 11476383.

It is an arithmetic number, because the mean of its divisors is an integer number (22707329400).

Almost surely, 2^643473473960 is an apocalyptic number.

It is an amenable number.

643473473960 is an abundant number, since it is smaller than the sum of its proper divisors (809795607640).

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

643473473960 is a wasteful number, since it uses less digits than its factorization.

643473473960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57290 (or 57286 counting only the distinct ones).

The product of its (nonzero) digits is 27433728, while the sum is 56.

The spelling of 643473473960 in words is "six hundred forty-three billion, four hundred seventy-three million, four hundred seventy-three thousand, nine hundred sixty".