1671705541 has 16 divisors (see below), whose sum is σ = 1876773888. Its totient is φ = 1475983600.

The previous prime is 1671705521. The next prime is 1671705559. The reversal of 1671705541 is 1455071761.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1671705541 - 2⁵ = 1671705509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1671705541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1671705521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55386 + ... + 80068.

It is an arithmetic number, because the mean of its divisors is an integer number (117298368).

Almost surely, 2^1671705541 is an apocalyptic number.

1671705541 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1671705541 is a deficient number, since it is larger than the sum of its proper divisors (205068347).

1671705541 is a wasteful number, since it uses less digits than its factorization.

1671705541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24872.

The product of its (nonzero) digits is 29400, while the sum is 37.

The square root of 1671705541 is about 40886.4958268620. The cubic root of 1671705541 is about 1186.8247486013.

The spelling of 1671705541 in words is "one billion, six hundred seventy-one million, seven hundred five thousand, five hundred forty-one".