641540789131 has 16 divisors (see below), whose sum is σ = 701672463360. Its totient is φ = 581711965920.

The previous prime is 641540789119. The next prime is 641540789189. The reversal of 641540789131 is 131987045146.

It is a cyclic number.

It is not a de Polignac number, because 641540789131 - 2¹³ = 641540780939 is a prime.

It is a super-2 number, since 2×641540789131² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (641540739131) by changing a digit.

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, 10946101 + ... + 11004553.

It is an arithmetic number, because the mean of its divisors is an integer number (43854528960).

Almost surely, 2^641540789131 is an apocalyptic number.

641540789131 is a deficient number, since it is larger than the sum of its proper divisors (60131674229).

641540789131 is a wasteful number, since it uses less digits than its factorization.

641540789131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61026.

The product of its (nonzero) digits is 725760, while the sum is 49.

The spelling of 641540789131 in words is "six hundred forty-one billion, five hundred forty million, seven hundred eighty-nine thousand, one hundred thirty-one".