641974611005 has 16 divisors (see below), whose sum is σ = 948147118464. Its totient is φ = 406348764480.

The previous prime is 641974611001. The next prime is 641974611017. The reversal of 641974611005 is 500116479146.

It is a happy number.

It is not a de Polignac number, because 641974611005 - 2² = 641974611001 is a prime.

It is a super-2 number, since 2×641974611005² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641974611001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 705466151 + ... + 705467060.

It is an arithmetic number, because the mean of its divisors is an integer number (59259194904).

Almost surely, 2^641974611005 is an apocalyptic number.

641974611005 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

641974611005 is a deficient number, since it is larger than the sum of its proper divisors (306172507459).

641974611005 is a wasteful number, since it uses less digits than its factorization.

641974611005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1410933236.

The product of its (nonzero) digits is 181440, while the sum is 44.

The spelling of 641974611005 in words is "six hundred forty-one billion, nine hundred seventy-four million, six hundred eleven thousand, five".