1188164131621 has 8 divisors (see below), whose sum is σ = 1208504661120. Its totient is φ = 1167956114208.

The previous prime is 1188164131591. The next prime is 1188164131657. The reversal of 1188164131621 is 1261314618811.

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 1188164131621 - 2²³ = 1188155743013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1188164135621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33109936 + ... + 33145801.

It is an arithmetic number, because the mean of its divisors is an integer number (151063082640).

Almost surely, 2^{1188164131621} is an apocalyptic number.

It is an amenable number.

1188164131621 is a deficient number, since it is larger than the sum of its proper divisors (20340529499).

1188164131621 is an equidigital number, since it uses as much as digits as its factorization.

1188164131621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66256043.

The product of its digits is 55296, while the sum is 43.

The spelling of 1188164131621 in words is "one trillion, one hundred eighty-eight billion, one hundred sixty-four million, one hundred thirty-one thousand, six hundred twenty-one".