1664125619648 has 28 divisors (see below), whose sum is σ = 3308286364872. Its totient is φ = 830541653760.

The previous prime is 1664125619647. The next prime is 1664125619659. The reversal of 1664125619648 is 8469165214661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664125619647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23732783 + ... + 23802798.

Almost surely, 2^{1664125619648} is an apocalyptic number.

It is an amenable number.

1664125619648 is a deficient number, since it is larger than the sum of its proper divisors (1644160745224).

1664125619648 is an equidigital number, since it uses as much as digits as its factorization.

1664125619648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47536140 (or 47536130 counting only the distinct ones).

The product of its digits is 14929920, while the sum is 59.

The spelling of 1664125619648 in words is "one trillion, six hundred sixty-four billion, one hundred twenty-five million, six hundred nineteen thousand, six hundred forty-eight".