3155406561 has 6 divisors (see below), whose sum is σ = 4557809490. Its totient is φ = 2103604368.

The previous prime is 3155406559. The next prime is 3155406571. The reversal of 3155406561 is 1656045513.

3155406561 is a `hidden beast` number, since 3 + 1 + 55 + 40 + 6 + 561 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3062958336 + 92448225 = 55344^2 + 9615^2 .

It is not a de Polignac number, because 3155406561 - 2¹ = 3155406559 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3155406571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 175300356 + ... + 175300373.

It is an arithmetic number, because the mean of its divisors is an integer number (759634915).

Almost surely, 2^3155406561 is an apocalyptic number.

It is an amenable number.

3155406561 is a deficient number, since it is larger than the sum of its proper divisors (1402402929).

3155406561 is a wasteful number, since it uses less digits than its factorization.

3155406561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350600735 (or 350600732 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The square root of 3155406561 is about 56173.0056254782. The cubic root of 3155406561 is about 1466.7354028105.

The spelling of 3155406561 in words is "three billion, one hundred fifty-five million, four hundred six thousand, five hundred sixty-one".