319475655649 has 4 divisors (see below), whose sum is σ = 320846796036. Its totient is φ = 318104515264.

The previous prime is 319475655617. The next prime is 319475655721. The reversal of 319475655649 is 946556574913.

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

It can be written as a sum of positive squares in 2 ways, for example, as 214924960000 + 104550695649 = 463600^2 + 323343^2 .

It is a cyclic number.

It is not a de Polignac number, because 319475655649 - 2⁵ = 319475655617 is a prime.

It is a super-2 number, since 2×319475655649² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (319475625649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 685569844 + ... + 685570309.

It is an arithmetic number, because the mean of its divisors is an integer number (80211699009).

Almost surely, 2^319475655649 is an apocalyptic number.

It is an amenable number.

319475655649 is a deficient number, since it is larger than the sum of its proper divisors (1371140387).

319475655649 is a wasteful number, since it uses less digits than its factorization.

319475655649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1371140386.

The product of its digits is 122472000, while the sum is 64.

The spelling of 319475655649 in words is "three hundred nineteen billion, four hundred seventy-five million, six hundred fifty-five thousand, six hundred forty-nine".