3618154250561 has 4 divisors (see below), whose sum is σ = 3667718007492. Its totient is φ = 3568590493632.

The previous prime is 3618154250453. The next prime is 3618154250593. The reversal of 3618154250561 is 1650524518163.

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 2876945176336 + 741209074225 = 1696156^2 + 860935^2 .

It is a cyclic number.

It is not a de Polignac number, because 3618154250561 - 2¹⁰ = 3618154249537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3618154258561) 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 3 ways as a sum of consecutive naturals, for example, 24781878356 + ... + 24781878501.

It is an arithmetic number, because the mean of its divisors is an integer number (916929501873).

Almost surely, 2^{3618154250561} is an apocalyptic number.

It is an amenable number.

3618154250561 is a deficient number, since it is larger than the sum of its proper divisors (49563756931).

3618154250561 is an equidigital number, since it uses as much as digits as its factorization.

3618154250561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49563756930.

The product of its (nonzero) digits is 864000, while the sum is 47.

The spelling of 3618154250561 in words is "three trillion, six hundred eighteen billion, one hundred fifty-four million, two hundred fifty thousand, five hundred sixty-one".