320136912972 has 144 divisors (see below), whose sum is σ = 873145308672. Its totient is φ = 98538024960.

The previous prime is 320136912959. The next prime is 320136913039. The reversal of 320136912972 is 279219631023.

320136912972 is a `hidden beast` number, since 3 + 201 + 369 + 12 + 9 + 72 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8514358 + ... + 8551874.

It is an arithmetic number, because the mean of its divisors is an integer number (6063509088).

Almost surely, 2^320136912972 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 320136912972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (436572654336).

320136912972 is an abundant number, since it is smaller than the sum of its proper divisors (553008395700).

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

320136912972 is a wasteful number, since it uses less digits than its factorization.

320136912972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37808 (or 37803 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The spelling of 320136912972 in words is "three hundred twenty billion, one hundred thirty-six million, nine hundred twelve thousand, nine hundred seventy-two".