319905145972 has 12 divisors (see below), whose sum is σ = 559892092900. Its totient is φ = 159935976576.

The previous prime is 319905145877. The next prime is 319905145979. The reversal of 319905145972 is 279541509913.

It can be written as a sum of positive squares in 2 ways, for example, as 49927221136 + 269977924836 = 223444^2 + 519594^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (319905145979) 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, 4105683 + ... + 4182874.

Almost surely, 2^319905145972 is an apocalyptic number.

It is an amenable number.

319905145972 is a deficient number, since it is larger than the sum of its proper divisors (239986946928).

319905145972 is a wasteful number, since it uses less digits than its factorization.

319905145972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8298210 (or 8298208 counting only the distinct ones).

The product of its (nonzero) digits is 3061800, while the sum is 55.

The spelling of 319905145972 in words is "three hundred nineteen billion, nine hundred five million, one hundred forty-five thousand, nine hundred seventy-two".