612105516727387 has 4 divisors (see below), whose sum is σ = 633212603511120. Its totient is φ = 590998429943656.

The previous prime is 612105516727351. The next prime is 612105516727429. The reversal of 612105516727387 is 783727615501216.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 612105516727387 - 2¹⁹ = 612105516203099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (612105516727787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10553543391823 + ... + 10553543391880.

It is an arithmetic number, because the mean of its divisors is an integer number (158303150877780).

Almost surely, 2^{612105516727387} is an apocalyptic number.

612105516727387 is a deficient number, since it is larger than the sum of its proper divisors (21107086783733).

612105516727387 is a wasteful number, since it uses less digits than its factorization.

612105516727387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21107086783732.

The product of its (nonzero) digits is 29635200, while the sum is 61.

The spelling of 612105516727387 in words is "six hundred twelve trillion, one hundred five billion, five hundred sixteen million, seven hundred twenty-seven thousand, three hundred eighty-seven".