643473604475 has 24 divisors (see below), whose sum is σ = 864556508592. Its totient is φ = 472265251200.

The previous prime is 643473604471. The next prime is 643473604481. The reversal of 643473604475 is 574406374346.

It is not a de Polignac number, because 643473604475 - 2² = 643473604471 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (643473604471) 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, 6020396 + ... + 6126345.

It is an arithmetic number, because the mean of its divisors is an integer number (36023187858).

Almost surely, 2^643473604475 is an apocalyptic number.

643473604475 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

643473604475 is a deficient number, since it is larger than the sum of its proper divisors (221082904117).

643473604475 is a wasteful number, since it uses less digits than its factorization.

643473604475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12146927 (or 12146922 counting only the distinct ones).

The product of its (nonzero) digits is 20321280, while the sum is 53.

The spelling of 643473604475 in words is "six hundred forty-three billion, four hundred seventy-three million, six hundred four thousand, four hundred seventy-five".