2206556111656 has 64 divisors (see below), whose sum is σ = 4483396688400. Its totient is φ = 1012063776768.

The previous prime is 2206556111651. The next prime is 2206556111657. The reversal of 2206556111656 is 6561116556022.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 156602232900 + 2049953878756 = 395730^2 + 1431766^2 .

It is not an unprimeable number, because it can be changed into a prime (2206556111651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11007136 + ... + 11205808.

Almost surely, 2^{2206556111656} is an apocalyptic number.

2206556111656 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

2206556111656 is an abundant number, since it is smaller than the sum of its proper divisors (2276840576744).

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

2206556111656 is a wasteful number, since it uses less digits than its factorization.

2206556111656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199358 (or 199354 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 46.

The spelling of 2206556111656 in words is "two trillion, two hundred six billion, five hundred fifty-six million, one hundred eleven thousand, six hundred fifty-six".