3648188921 has 8 divisors (see below), whose sum is σ = 3941456064. Its totient is φ = 3356727120.

The previous prime is 3648188849. The next prime is 3648188939. The reversal of 3648188921 is 1298818463.

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 3648188921 - 2²⁶ = 3581080057 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3648188921.

It is not an unprimeable number, because it can be changed into a prime (3648188821) 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, 447131 + ... + 455216.

It is an arithmetic number, because the mean of its divisors is an integer number (492682008).

Almost surely, 2^3648188921 is an apocalyptic number.

It is an amenable number.

3648188921 is a deficient number, since it is larger than the sum of its proper divisors (293267143).

3648188921 is a wasteful number, since it uses less digits than its factorization.

3648188921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 902671.

The product of its digits is 663552, while the sum is 50.

The square root of 3648188921 is about 60400.2394117772. The cubic root of 3648188921 is about 1539.4270259804.

The spelling of 3648188921 in words is "three billion, six hundred forty-eight million, one hundred eighty-eight thousand, nine hundred twenty-one".