165551460561233 has 4 divisors (see below), whose sum is σ = 165555232482288. Its totient is φ = 165547688640180.

The previous prime is 165551460561173. The next prime is 165551460561269. The reversal of 165551460561233 is 332165064155561.

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 165551460561233 - 2⁸ = 165551460560977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165551460563233) 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, 1885894691 + ... + 1885982472.

It is an arithmetic number, because the mean of its divisors is an integer number (41388808120572).

Almost surely, 2^{165551460561233} is an apocalyptic number.

It is an amenable number.

165551460561233 is a deficient number, since it is larger than the sum of its proper divisors (3771921055).

165551460561233 is an equidigital number, since it uses as much as digits as its factorization.

165551460561233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3771921054.

The product of its (nonzero) digits is 9720000, while the sum is 53.

The spelling of 165551460561233 in words is "one hundred sixty-five trillion, five hundred fifty-one billion, four hundred sixty million, five hundred sixty-one thousand, two hundred thirty-three".