612506362161 has 4 divisors (see below), whose sum is σ = 816675149552. Its totient is φ = 408337574772.

The previous prime is 612506362151. The next prime is 612506362199. The reversal of 612506362161 is 161263605216.

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 not a de Polignac number, because 612506362161 - 2¹³ = 612506353969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (612506362151) 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, 102084393691 + ... + 102084393696.

It is an arithmetic number, because the mean of its divisors is an integer number (204168787388).

Almost surely, 2^612506362161 is an apocalyptic number.

It is an amenable number.

612506362161 is a deficient number, since it is larger than the sum of its proper divisors (204168787391).

612506362161 is a wasteful number, since it uses less digits than its factorization.

612506362161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204168787390.

The product of its (nonzero) digits is 77760, while the sum is 39.

Adding to 612506362161 its reverse (161263605216), we get a palindrome (773769967377).

The spelling of 612506362161 in words is "six hundred twelve billion, five hundred six million, three hundred sixty-two thousand, one hundred sixty-one".