643265461415 has 16 divisors (see below), whose sum is σ = 806768786880. Its totient is φ = 491744762880.

The previous prime is 643265461403. The next prime is 643265461441. The reversal of 643265461415 is 514164562346.

It is not a de Polignac number, because 643265461415 - 2¹⁰ = 643265460391 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 643265461415.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22853531 + ... + 22881660.

It is an arithmetic number, because the mean of its divisors is an integer number (50423049180).

Almost surely, 2^643265461415 is an apocalyptic number.

643265461415 is a deficient number, since it is larger than the sum of its proper divisors (163503325465).

643265461415 is a wasteful number, since it uses less digits than its factorization.

643265461415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45735322.

The product of its digits is 2073600, while the sum is 47.

The spelling of 643265461415 in words is "six hundred forty-three billion, two hundred sixty-five million, four hundred sixty-one thousand, four hundred fifteen".