1954354673563 has 2 divisors, whose sum is σ = 1954354673564. Its totient is φ = 1954354673562.

The previous prime is 1954354673539. The next prime is 1954354673617. The reversal of 1954354673563 is 3653764534591.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1954354673563 is a prime.

It is a super-2 number, since 2×1954354673563² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1954354670563) 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, 977177336781 + 977177336782.

It is an arithmetic number, because the mean of its divisors is an integer number (977177336782).

Almost surely, 2^{1954354673563} is an apocalyptic number.

1954354673563 is a deficient number, since it is larger than the sum of its proper divisors (1).

1954354673563 is an equidigital number, since it uses as much as digits as its factorization.

1954354673563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 122472000, while the sum is 61.

The spelling of 1954354673563 in words is "one trillion, nine hundred fifty-four billion, three hundred fifty-four million, six hundred seventy-three thousand, five hundred sixty-three".