2156445341563 has 8 divisors (see below), whose sum is σ = 2209061218896. Its totient is φ = 2103830400000.

The previous prime is 2156445341521. The next prime is 2156445341621. The reversal of 2156445341563 is 3651435446512.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2156445341563 is a prime.

It is a super-2 number, since 2×2156445341563² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2156445341663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7561563 + ... + 7841563.

It is an arithmetic number, because the mean of its divisors is an integer number (276132652362).

Almost surely, 2^{2156445341563} is an apocalyptic number.

2156445341563 is a deficient number, since it is larger than the sum of its proper divisors (52615877333).

2156445341563 is a wasteful number, since it uses less digits than its factorization.

2156445341563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467885.

The product of its digits is 5184000, while the sum is 49.

The spelling of 2156445341563 in words is "two trillion, one hundred fifty-six billion, four hundred forty-five million, three hundred forty-one thousand, five hundred sixty-three".