1664231550135 has 64 divisors (see below), whose sum is σ = 3323238948864. Its totient is φ = 690915945600.

The previous prime is 1664231550083. The next prime is 1664231550151. The reversal of 1664231550135 is 5310551324661.

It is a happy number.

It is not a de Polignac number, because 1664231550135 - 2²² = 1664227355831 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 379542 + ... + 1863468.

It is an arithmetic number, because the mean of its divisors is an integer number (51925608576).

Almost surely, 2^{1664231550135} is an apocalyptic number.

1664231550135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1664231550135 is a deficient number, since it is larger than the sum of its proper divisors (1659007398729).

1664231550135 is a wasteful number, since it uses less digits than its factorization.

1664231550135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1484924.

The product of its (nonzero) digits is 324000, while the sum is 42.

Adding to 1664231550135 its reverse (5310551324661), we get a palindrome (6974782874796).

The spelling of 1664231550135 in words is "one trillion, six hundred sixty-four billion, two hundred thirty-one million, five hundred fifty thousand, one hundred thirty-five".