2156445415207 has 2 divisors, whose sum is σ = 2156445415208. Its totient is φ = 2156445415206.

The previous prime is 2156445415067. The next prime is 2156445415231. The reversal of 2156445415207 is 7025145446512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2156445415207 - 2¹¹ = 2156445413159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2156445415507) 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 as a sum of consecutive naturals, namely, 1078222707603 + 1078222707604.

It is an arithmetic number, because the mean of its divisors is an integer number (1078222707604).

Almost surely, 2^{2156445415207} is an apocalyptic number.

2156445415207 is a deficient number, since it is larger than the sum of its proper divisors (1).

2156445415207 is an equidigital number, since it uses as much as digits as its factorization.

2156445415207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344000, while the sum is 46.

The spelling of 2156445415207 in words is "two trillion, one hundred fifty-six billion, four hundred forty-five million, four hundred fifteen thousand, two hundred seven".