641954267135 has 32 divisors (see below), whose sum is σ = 778475722752. Its totient is φ = 508179934080.

The previous prime is 641954267083. The next prime is 641954267153. The reversal of 641954267135 is 531762459146.

It is not a de Polignac number, because 641954267135 - 2¹⁰ = 641954266111 is a prime.

It is a super-2 number, since 2×641954267135² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 144354482 + ... + 144358928.

It is an arithmetic number, because the mean of its divisors is an integer number (24327366336).

Almost surely, 2^641954267135 is an apocalyptic number.

641954267135 is a deficient number, since it is larger than the sum of its proper divisors (136521455617).

641954267135 is a wasteful number, since it uses less digits than its factorization.

641954267135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5423.

The product of its digits is 5443200, while the sum is 53.

The spelling of 641954267135 in words is "six hundred forty-one billion, nine hundred fifty-four million, two hundred sixty-seven thousand, one hundred thirty-five".