319649565972 has 24 divisors (see below), whose sum is σ = 813653440992. Its totient is φ = 96863504800.

The previous prime is 319649565953. The next prime is 319649565979. The reversal of 319649565972 is 279565946913.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (319649565979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1210793679 + ... + 1210793942.

It is an arithmetic number, because the mean of its divisors is an integer number (33902226708).

Almost surely, 2^319649565972 is an apocalyptic number.

It is an amenable number.

319649565972 is an abundant number, since it is smaller than the sum of its proper divisors (494003875020).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

319649565972 is a wasteful number, since it uses less digits than its factorization.

319649565972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2421587639 (or 2421587637 counting only the distinct ones).

The product of its digits is 110224800, while the sum is 66.

The spelling of 319649565972 in words is "three hundred nineteen billion, six hundred forty-nine million, five hundred sixty-five thousand, nine hundred seventy-two".