2081206656 has 64 divisors (see below), whose sum is σ = 6142460400. Its totient is φ = 693734400.

The previous prime is 2081206649. The next prime is 2081206693. The reversal of 2081206656 is 6566021802.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×2081206656² = 8662842289957404672, which contains 22 as substring.

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 2081206656.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 297645 + ... + 304556.

Almost surely, 2^2081206656 is an apocalyptic number.

It is an amenable number.

2081206656 is an abundant number, since it is smaller than the sum of its proper divisors (4061253744).

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

2081206656 is an equidigital number, since it uses as much as digits as its factorization.

2081206656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602224 (or 602206 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 2081206656 is about 45620.2439274496. The cubic root of 2081206656 is about 1276.7476545898.

The spelling of 2081206656 in words is "two billion, eighty-one million, two hundred six thousand, six hundred fifty-six".