154335205345561 has 4 divisors (see below), whose sum is σ = 156069308776500. Its totient is φ = 152601101914624.

The previous prime is 154335205345543. The next prime is 154335205345567. The reversal of 154335205345561 is 165543502533451.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 107938468750336 + 46396736595225 = 10389344^2 + 6811515^2 .

It is a cyclic number.

It is not a de Polignac number, because 154335205345561 - 2⁹ = 154335205345049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 154335205345499 and 154335205345508.

It is not an unprimeable number, because it can be changed into a prime (154335205345567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 867051715336 + ... + 867051715513.

It is an arithmetic number, because the mean of its divisors is an integer number (39017327194125).

Almost surely, 2^{154335205345561} is an apocalyptic number.

It is an amenable number.

154335205345561 is a deficient number, since it is larger than the sum of its proper divisors (1734103430939).

154335205345561 is an equidigital number, since it uses as much as digits as its factorization.

154335205345561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1734103430938.

The product of its (nonzero) digits is 16200000, while the sum is 52.

The spelling of 154335205345561 in words is "one hundred fifty-four trillion, three hundred thirty-five billion, two hundred five million, three hundred forty-five thousand, five hundred sixty-one".