54949245409 has 2 divisors, whose sum is σ = 54949245410. Its totient is φ = 54949245408.

The previous prime is 54949245359. The next prime is 54949245427. The reversal of 54949245409 is 90454294945.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49786104384 + 5163141025 = 223128^2 + 71855^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54949245409 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 54949245409.

It is not a weakly prime, because it can be changed into another prime (54949245709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27474622704 + 27474622705.

It is an arithmetic number, because the mean of its divisors is an integer number (27474622705).

Almost surely, 2^54949245409 is an apocalyptic number.

It is an amenable number.

54949245409 is a deficient number, since it is larger than the sum of its proper divisors (1).

54949245409 is an equidigital number, since it uses as much as digits as its factorization.

54949245409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9331200, while the sum is 55.

The spelling of 54949245409 in words is "fifty-four billion, nine hundred forty-nine million, two hundred forty-five thousand, four hundred nine".