643421126095 has 64 divisors (see below), whose sum is σ = 902866849920. Its totient is φ = 434984140800.

The previous prime is 643421126083. The next prime is 643421126119. The reversal of 643421126095 is 590621124346.

It is not a de Polignac number, because 643421126095 - 2¹³ = 643421117903 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 84958729 + ... + 84966301.

It is an arithmetic number, because the mean of its divisors is an integer number (14107294530).

Almost surely, 2^643421126095 is an apocalyptic number.

643421126095 is a deficient number, since it is larger than the sum of its proper divisors (259445723825).

643421126095 is a wasteful number, since it uses less digits than its factorization.

643421126095 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8716.

The product of its (nonzero) digits is 311040, while the sum is 43.

The spelling of 643421126095 in words is "six hundred forty-three billion, four hundred twenty-one million, one hundred twenty-six thousand, ninety-five".