1664141265 has 24 divisors (see below), whose sum is σ = 2889219840. Its totient is φ = 886093344.

The previous prime is 1664141263. The next prime is 1664141273. The reversal of 1664141265 is 5621414661.

1664141265 is a `hidden beast` number, since 1 + 6 + 641 + 4 + 1 + 2 + 6 + 5 = 666.

It is not a de Polignac number, because 1664141265 - 2¹ = 1664141263 is a prime.

It is a super-2 number, since 2×1664141265² = 5538732299751600450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1664141263) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2017 + ... + 57726.

It is an arithmetic number, because the mean of its divisors is an integer number (120384160).

Almost surely, 2^1664141265 is an apocalyptic number.

1664141265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1664141265 is a deficient number, since it is larger than the sum of its proper divisors (1225078575).

1664141265 is a wasteful number, since it uses less digits than its factorization.

1664141265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60373 (or 60370 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 1664141265 is about 40793.8875936089. The cubic root of 1664141265 is about 1185.0319598281.

The spelling of 1664141265 in words is "one billion, six hundred sixty-four million, one hundred forty-one thousand, two hundred sixty-five".