2012261631564 has 12 divisors (see below), whose sum is σ = 4695277140344. Its totient is φ = 670753877184.

The previous prime is 2012261631563. The next prime is 2012261631581. The reversal of 2012261631564 is 4651361622102.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×2012261631564² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2012261631563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83844234637 + ... + 83844234660.

Almost surely, 2^{2012261631564} is an apocalyptic number.

It is an amenable number.

2012261631564 is an abundant number, since it is smaller than the sum of its proper divisors (2683015508780).

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

2012261631564 is a wasteful number, since it uses less digits than its factorization.

2012261631564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167688469304 (or 167688469302 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 39.

The spelling of 2012261631564 in words is "two trillion, twelve billion, two hundred sixty-one million, six hundred thirty-one thousand, five hundred sixty-four".