1641165654 has 16 divisors (see below), whose sum is σ = 3285283248. Its totient is φ = 546563232.

The previous prime is 1641165629. The next prime is 1641165661. The reversal of 1641165654 is 4565611461.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115737 + ... + 129140.

It is an arithmetic number, because the mean of its divisors is an integer number (205330203).

Almost surely, 2^1641165654 is an apocalyptic number.

1641165654 is an abundant number, since it is smaller than the sum of its proper divisors (1644117594).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1641165654 is a wasteful number, since it uses less digits than its factorization.

1641165654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245999.

The product of its digits is 86400, while the sum is 39.

The square root of 1641165654 is about 40511.3027931712. The cubic root of 1641165654 is about 1179.5530371740.

The spelling of 1641165654 in words is "one billion, six hundred forty-one million, one hundred sixty-five thousand, six hundred fifty-four".