643462426415 has 16 divisors (see below), whose sum is σ = 797184503040. Its totient is φ = 498088604160.

The previous prime is 643462426403. The next prime is 643462426429. The reversal of 643462426415 is 514624264346.

It is not a de Polignac number, because 643462426415 - 2⁶ = 643462426351 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 643462426415.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 715991 + ... + 1341479.

It is an arithmetic number, because the mean of its divisors is an integer number (49824031440).

Almost surely, 2^643462426415 is an apocalyptic number.

643462426415 is a deficient number, since it is larger than the sum of its proper divisors (153722076625).

643462426415 is a wasteful number, since it uses less digits than its factorization.

643462426415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632162.

The product of its digits is 3317760, while the sum is 47.

The spelling of 643462426415 in words is "six hundred forty-three billion, four hundred sixty-two million, four hundred twenty-six thousand, four hundred fifteen".