2001533705500 has 48 divisors (see below), whose sum is σ = 4995828137664. Its totient is φ = 686240126400.

The previous prime is 2001533705489. The next prime is 2001533705527. The reversal of 2001533705500 is 55073351002.

It is a super-2 number, since 2×2001533705500² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 285929887 + ... + 285936886.

It is an arithmetic number, because the mean of its divisors is an integer number (104079752868).

Almost surely, 2^{2001533705500} is an apocalyptic number.

2001533705500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001533705500 is an abundant number, since it is smaller than the sum of its proper divisors (2994294432164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2001533705500 is a wasteful number, since it uses less digits than its factorization.

2001533705500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571866799 (or 571866787 counting only the distinct ones).

The product of its (nonzero) digits is 15750, while the sum is 31.

The spelling of 2001533705500 in words is "two trillion, one billion, five hundred thirty-three million, seven hundred five thousand, five hundred".