1641654105 has 48 divisors (see below), whose sum is σ = 3290543424. Its totient is φ = 692737920.

The previous prime is 1641654089. The next prime is 1641654107. The reversal of 1641654105 is 5014561461.

It is not a de Polignac number, because 1641654105 - 2⁴ = 1641654089 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1641654107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 76351 + ... + 95460.

It is an arithmetic number, because the mean of its divisors is an integer number (68552988).

Almost surely, 2^1641654105 is an apocalyptic number.

1641654105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1641654105 is an abundant number, since it is smaller than the sum of its proper divisors (1648889319).

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

1641654105 is a wasteful number, since it uses less digits than its factorization.

1641654105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171846 (or 171839 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 1641654105 is about 40517.3309214711. The cubic root of 1641654105 is about 1179.6700468350.

The spelling of 1641654105 in words is "one billion, six hundred forty-one million, six hundred fifty-four thousand, one hundred five".