2154360477641 has 2 divisors, whose sum is σ = 2154360477642. Its totient is φ = 2154360477640.

The previous prime is 2154360477631. The next prime is 2154360477671. The reversal of 2154360477641 is 1467740634512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1815543351241 + 338817126400 = 1347421^2 + 582080^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2154360477641 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2154360477641.

It is not a weakly prime, because it can be changed into another prime (2154360477611) 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, 1077180238820 + 1077180238821.

It is an arithmetic number, because the mean of its divisors is an integer number (1077180238821).

Almost surely, 2^{2154360477641} is an apocalyptic number.

It is an amenable number.

2154360477641 is a deficient number, since it is larger than the sum of its proper divisors (1).

2154360477641 is an equidigital number, since it uses as much as digits as its factorization.

2154360477641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3386880, while the sum is 50.

The spelling of 2154360477641 in words is "two trillion, one hundred fifty-four billion, three hundred sixty million, four hundred seventy-seven thousand, six hundred forty-one".