612613831919 has 4 divisors (see below), whose sum is σ = 612692450496. Its totient is φ = 612535213344.

The previous prime is 612613831913. The next prime is 612613831927. The reversal of 612613831919 is 919138316216.

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 612613831919 - 2⁸ = 612613831663 is a prime.

It is a super-2 number, since 2×612613831919² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612613831913) 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, 39297599 + ... + 39313184.

It is an arithmetic number, because the mean of its divisors is an integer number (153173112624).

Almost surely, 2^612613831919 is an apocalyptic number.

612613831919 is a deficient number, since it is larger than the sum of its proper divisors (78618577).

612613831919 is an equidigital number, since it uses as much as digits as its factorization.

612613831919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78618576.

The product of its digits is 419904, while the sum is 50.

The spelling of 612613831919 in words is "six hundred twelve billion, six hundred thirteen million, eight hundred thirty-one thousand, nine hundred nineteen".