2661543046512 has 60 divisors (see below), whose sum is σ = 8512713080560. Its totient is φ = 760440870144.

The previous prime is 2661543046511. The next prime is 2661543046523. The reversal of 2661543046512 is 2156403451662.

2661543046512 is a `hidden beast` number, since 2 + 6 + 6 + 154 + 30 + 465 + 1 + 2 = 666.

It is a super-2 number, since 2×2661543046512² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2661543046511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1320208837 + ... + 1320210852.

Almost surely, 2^{2661543046512} is an apocalyptic number.

It is an amenable number.

2661543046512 is an abundant number, since it is smaller than the sum of its proper divisors (5851170034048).

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

2661543046512 is a wasteful number, since it uses less digits than its factorization.

2661543046512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2640419710 (or 2640419701 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 45.

The spelling of 2661543046512 in words is "two trillion, six hundred sixty-one billion, five hundred forty-three million, forty-six thousand, five hundred twelve".