2001535344566 has 32 divisors (see below), whose sum is σ = 3111997812480. Its totient is φ = 964870504416.

The previous prime is 2001535344563. The next prime is 2001535344581. The reversal of 2001535344566 is 6654435351002.

It is a super-2 number, since 2×2001535344566² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001535344563) 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, 16493885 + ... + 16614791.

It is an arithmetic number, because the mean of its divisors is an integer number (97249931640).

Almost surely, 2^{2001535344566} is an apocalyptic number.

2001535344566 is a deficient number, since it is larger than the sum of its proper divisors (1110462467914).

2001535344566 is a wasteful number, since it uses less digits than its factorization.

2001535344566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123668.

The product of its (nonzero) digits is 1296000, while the sum is 44.

The spelling of 2001535344566 in words is "two trillion, one billion, five hundred thirty-five million, three hundred forty-four thousand, five hundred sixty-six".