2156664256246 has 16 divisors (see below), whose sum is σ = 3358457432640. Its totient is φ = 1037443099840.

The previous prime is 2156664256189. The next prime is 2156664256249. The reversal of 2156664256246 is 6426524666512.

It is a super-2 number, since 2×2156664256246² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156664256249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66147166 + ... + 66179761.

It is an arithmetic number, because the mean of its divisors is an integer number (209903589540).

Almost surely, 2^{2156664256246} is an apocalyptic number.

2156664256246 is a deficient number, since it is larger than the sum of its proper divisors (1201793176394).

2156664256246 is a wasteful number, since it uses less digits than its factorization.

2156664256246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132327239.

The product of its digits is 24883200, while the sum is 55.

The spelling of 2156664256246 in words is "two trillion, one hundred fifty-six billion, six hundred sixty-four million, two hundred fifty-six thousand, two hundred forty-six".