2043664952571 has 18 divisors (see below), whose sum is σ = 3220342945092. Its totient is φ = 1238576199120.

The previous prime is 2043664952533. The next prime is 2043664952591. The reversal of 2043664952571 is 1752594663402.

It is a happy number.

2043664952571 is a `hidden beast` number, since 2 + 0 + 4 + 3 + 6 + 6 + 49 + 525 + 71 = 666.

It is not a de Polignac number, because 2043664952571 - 2⁷ = 2043664952443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2043664952501) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 14152185 + ... + 14295861.

It is an arithmetic number, because the mean of its divisors is an integer number (178907941394).

Almost surely, 2^{2043664952571} is an apocalyptic number.

2043664952571 is a deficient number, since it is larger than the sum of its proper divisors (1176677992521).

2043664952571 is an frugal number, since it uses more digits than its factorization.

2043664952571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287371 (or 143691 counting only the distinct ones).

The product of its (nonzero) digits is 10886400, while the sum is 54.

The spelling of 2043664952571 in words is "two trillion, forty-three billion, six hundred sixty-four million, nine hundred fifty-two thousand, five hundred seventy-one".