1664745615001 has 8 divisors (see below), whose sum is σ = 1908683996544. Its totient is φ = 1422336628320.

The previous prime is 1664745614989. The next prime is 1664745615011. The reversal of 1664745615001 is 1005165474661.

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 1664745615001 - 2¹¹ = 1664745612953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1664745615011) 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, 382346380 + ... + 382350733.

It is an arithmetic number, because the mean of its divisors is an integer number (238585499568).

Almost surely, 2^{1664745615001} is an apocalyptic number.

It is an amenable number.

1664745615001 is a deficient number, since it is larger than the sum of its proper divisors (243938381543).

1664745615001 is an equidigital number, since it uses as much as digits as its factorization.

1664745615001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 764697431.

The product of its (nonzero) digits is 604800, while the sum is 46.

The spelling of 1664745615001 in words is "one trillion, six hundred sixty-four billion, seven hundred forty-five million, six hundred fifteen thousand, one".