188640566797321 has 8 divisors (see below), whose sum is σ = 193280461524864. Its totient is φ = 184002524702880.

The previous prime is 188640566797237. The next prime is 188640566797357. The reversal of 188640566797321 is 123797665046881.

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 188640566797321 - 2¹⁵ = 188640566764553 is a prime.

It is a super-2 number, since 2×188640566797321² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (188640566797381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 462952125 + ... + 463359418.

It is an arithmetic number, because the mean of its divisors is an integer number (24160057690608).

It is a 1-persistent number, because it is pandigital, but 2⋅188640566797321 = 377281133594642 is not.

Almost surely, 2^{188640566797321} is an apocalyptic number.

It is an amenable number.

188640566797321 is a deficient number, since it is larger than the sum of its proper divisors (4639894727543).

188640566797321 is an equidigital number, since it uses as much as digits as its factorization.

188640566797321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 926316551.

The product of its (nonzero) digits is 731566080, while the sum is 73.

The spelling of 188640566797321 in words is "one hundred eighty-eight trillion, six hundred forty billion, five hundred sixty-six million, seven hundred ninety-seven thousand, three hundred twenty-one".