2154555453719 has 2 divisors, whose sum is σ = 2154555453720. Its totient is φ = 2154555453718.

The previous prime is 2154555453703. The next prime is 2154555453793. The reversal of 2154555453719 is 9173545554512.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2154555453719 - 2⁴ = 2154555453703 is a prime.

It is a super-2 number, since 2×2154555453719² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2154555456719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077277726859 + 1077277726860.

It is an arithmetic number, because the mean of its divisors is an integer number (1077277726860).

Almost surely, 2^{2154555453719} is an apocalyptic number.

2154555453719 is a deficient number, since it is larger than the sum of its proper divisors (1).

2154555453719 is an equidigital number, since it uses as much as digits as its factorization.

2154555453719 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18900000, while the sum is 56.

The spelling of 2154555453719 in words is "two trillion, one hundred fifty-four billion, five hundred fifty-five million, four hundred fifty-three thousand, seven hundred nineteen".