643265154460 has 24 divisors (see below), whose sum is σ = 1350876705696. Its totient is φ = 257302274880.

The previous prime is 643265154407. The next prime is 643265154473. The reversal of 643265154460 is 64451562346.

It is a self number, because there is not a number n which added to its sum of digits gives 643265154460.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1449054 + ... + 1840186.

It is an arithmetic number, because the mean of its divisors is an integer number (56286529404).

Almost surely, 2^643265154460 is an apocalyptic number.

It is an amenable number.

643265154460 is an abundant number, since it is smaller than the sum of its proper divisors (707611551236).

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

643265154460 is a wasteful number, since it uses less digits than its factorization.

643265154460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473373 (or 473371 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 46.

The spelling of 643265154460 in words is "six hundred forty-three billion, two hundred sixty-five million, one hundred fifty-four thousand, four hundred sixty".