1612552552161 has 4 divisors (see below), whose sum is σ = 2150070069552. Its totient is φ = 1075035034772.

The previous prime is 1612552552147. The next prime is 1612552552181.

It is a happy number.

1612552552161 is nontrivially palindromic in base 10.

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 1612552552161 - 2⁶ = 1612552552097 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1612552552111) 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, 268758758691 + ... + 268758758696.

It is an arithmetic number, because the mean of its divisors is an integer number (537517517388).

Almost surely, 2^{1612552552161} is an apocalyptic number.

It is an amenable number.

1612552552161 is a deficient number, since it is larger than the sum of its proper divisors (537517517391).

1612552552161 is an equidigital number, since it uses as much as digits as its factorization.

1612552552161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537517517390.

The product of its digits is 180000, while the sum is 42.

The spelling of 1612552552161 in words is "one trillion, six hundred twelve billion, five hundred fifty-two million, five hundred fifty-two thousand, one hundred sixty-one".