1550000165161 has 4 divisors (see below), whose sum is σ = 1771428760192. Its totient is φ = 1328571570132.

The previous prime is 1550000165123. The next prime is 1550000165237. The reversal of 1550000165161 is 1615610000551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1550000165161 - 2¹¹ = 1550000163113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1550000165561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110714297505 + ... + 110714297518.

It is an arithmetic number, because the mean of its divisors is an integer number (442857190048).

Almost surely, 2^{1550000165161} is an apocalyptic number.

It is an amenable number.

1550000165161 is a deficient number, since it is larger than the sum of its proper divisors (221428595031).

1550000165161 is an equidigital number, since it uses as much as digits as its factorization.

1550000165161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221428595030.

The product of its (nonzero) digits is 4500, while the sum is 31.

The spelling of 1550000165161 in words is "one trillion, five hundred fifty billion, one hundred sixty-five thousand, one hundred sixty-one".