1664231550001 has 8 divisors (see below), whose sum is σ = 1664771846504. Its totient is φ = 1663691339520.

The previous prime is 1664231549989. The next prime is 1664231550031. The reversal of 1664231550001 is 1000551324661.

It can be written as a sum of positive squares in 4 ways, for example, as 487831005601 + 1176400544400 = 698449^2 + 1084620^2 .

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 1664231550001 - 2⁹ = 1664231549489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1664231550031) 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, 77768035 + ... + 77789431.

It is an arithmetic number, because the mean of its divisors is an integer number (208096480813).

Almost surely, 2^{1664231550001} is an apocalyptic number.

It is an amenable number.

1664231550001 is a deficient number, since it is larger than the sum of its proper divisors (540296503).

1664231550001 is a wasteful number, since it uses less digits than its factorization.

1664231550001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43011.

The product of its (nonzero) digits is 21600, while the sum is 34.

Adding to 1664231550001 its reverse (1000551324661), we get a palindrome (2664782874662).

The spelling of 1664231550001 in words is "one trillion, six hundred sixty-four billion, two hundred thirty-one million, five hundred fifty thousand, one".