1664176981139 has 8 divisors (see below), whose sum is σ = 1722612653568. Its totient is φ = 1606449620160.

The previous prime is 1664176981127. The next prime is 1664176981151. The reversal of 1664176981139 is 9311896714661.

It is an interprime number because it is at equal distance from previous prime (1664176981127) and next prime (1664176981151).

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 1664176981139 - 2⁸ = 1664176980883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1664176981109) 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, 177073082 + ... + 177082479.

It is an arithmetic number, because the mean of its divisors is an integer number (215326581696).

Almost surely, 2^{1664176981139} is an apocalyptic number.

1664176981139 is a deficient number, since it is larger than the sum of its proper divisors (58435672429).

1664176981139 is a wasteful number, since it uses less digits than its factorization.

1664176981139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354155725.

The product of its digits is 11757312, while the sum is 62.

The spelling of 1664176981139 in words is "one trillion, six hundred sixty-four billion, one hundred seventy-six million, nine hundred eighty-one thousand, one hundred thirty-nine".