2000405431656 has 24 divisors (see below), whose sum is σ = 5417764710930. Its totient is φ = 666801810528.

The previous prime is 2000405431649. The next prime is 2000405431667. The reversal of 2000405431656 is 6561345040002.

2000405431656 is a `hidden beast` number, since 20 + 0 + 0 + 40 + 543 + 1 + 6 + 56 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1870783830756 + 129621600900 = 1367766^2 + 360030^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 2000405431656.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13891704315 + ... + 13891704458.

Almost surely, 2^{2000405431656} is an apocalyptic number.

It is an amenable number.

2000405431656 is an abundant number, since it is smaller than the sum of its proper divisors (3417359279274).

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

2000405431656 is a wasteful number, since it uses less digits than its factorization.

2000405431656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27783408785 (or 27783408778 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The spelling of 2000405431656 in words is "two trillion, four hundred five million, four hundred thirty-one thousand, six hundred fifty-six".