154205360455409 has 2 divisors, whose sum is σ = 154205360455410. Its totient is φ = 154205360455408.

The previous prime is 154205360455283. The next prime is 154205360455459. The reversal of 154205360455409 is 904554063502451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 141316341399025 + 12889019056384 = 11887655^2 + 3590128^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-154205360455409 is a prime.

It is not a weakly prime, because it can be changed into another prime (154205360455459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77102680227704 + 77102680227705.

It is an arithmetic number, because the mean of its divisors is an integer number (77102680227705).

Almost surely, 2^{154205360455409} is an apocalyptic number.

It is an amenable number.

154205360455409 is a deficient number, since it is larger than the sum of its proper divisors (1).

154205360455409 is an equidigital number, since it uses as much as digits as its factorization.

154205360455409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960000, while the sum is 53.

The spelling of 154205360455409 in words is "one hundred fifty-four trillion, two hundred five billion, three hundred sixty million, four hundred fifty-five thousand, four hundred nine".