320187728631 has 8 divisors (see below), whose sum is σ = 431143872624. Its totient is φ = 211345035200.

The previous prime is 320187728603. The next prime is 320187728633. The reversal of 320187728631 is 136827781023.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 320187728631 - 2⁵ = 320187728599 is a prime.

It is a super-2 number, since 2×320187728631² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320187728633) 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 7 ways as a sum of consecutive naturals, for example, 528362286 + ... + 528362891.

It is an arithmetic number, because the mean of its divisors is an integer number (53892984078).

Almost surely, 2^320187728631 is an apocalyptic number.

320187728631 is a deficient number, since it is larger than the sum of its proper divisors (110956143993).

320187728631 is a wasteful number, since it uses less digits than its factorization.

320187728631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1056725281.

The product of its (nonzero) digits is 677376, while the sum is 48.

The spelling of 320187728631 in words is "three hundred twenty billion, one hundred eighty-seven million, seven hundred twenty-eight thousand, six hundred thirty-one".