2641205912985 has 288 divisors, whose sum is σ = 5326334807040. Its totient is φ = 1202848002048.

The previous prime is 2641205912981. The next prime is 2641205912987. The reversal of 2641205912985 is 5892195021462.

2641205912985 is a `hidden beast` number, since 2 + 6 + 4 + 1 + 20 + 591 + 29 + 8 + 5 = 666.

It is not a de Polignac number, because 2641205912985 - 2² = 2641205912981 is a prime.

It is a super-2 number, since 2×2641205912985² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2641205912981) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 1776196912 + ... + 1776198398.

It is an arithmetic number, because the mean of its divisors is an integer number (18494218080).

Almost surely, 2^{2641205912985} is an apocalyptic number.

It is an amenable number.

2641205912985 is an abundant number, since it is smaller than the sum of its proper divisors (2685128894055).

2641205912985 is a wasteful number, since it uses less digits than its factorization.

2641205912985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1685 (or 1623 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 54.

The spelling of 2641205912985 in words is "two trillion, six hundred forty-one billion, two hundred five million, nine hundred twelve thousand, nine hundred eighty-five".