1553171774161 has 16 divisors (see below), whose sum is σ = 1820279589120. Its totient is φ = 1297791855360.

The previous prime is 1553171774117. The next prime is 1553171774183. The reversal of 1553171774161 is 1614771713551.

It is a happy number.

It is not a de Polignac number, because 1553171774161 - 2¹⁵ = 1553171741393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1553171774101) 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 15 ways as a sum of consecutive naturals, for example, 17512476 + ... + 17600941.

It is an arithmetic number, because the mean of its divisors is an integer number (113767474320).

Almost surely, 2^{1553171774161} is an apocalyptic number.

It is an amenable number.

1553171774161 is a deficient number, since it is larger than the sum of its proper divisors (267107814959).

1553171774161 is an equidigital number, since it uses as much as digits as its factorization.

1553171774161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35113584.

The product of its digits is 617400, while the sum is 49.

The spelling of 1553171774161 in words is "one trillion, five hundred fifty-three billion, one hundred seventy-one million, seven hundred seventy-four thousand, one hundred sixty-one".