1671653617 has 8 divisors (see below), whose sum is σ = 1688752800. Its totient is φ = 1654581984.

The previous prime is 1671653609. The next prime is 1671653623. The reversal of 1671653617 is 7163561761.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1671653617 - 2³ = 1671653609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1671653647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128509 + ... + 140917.

It is an arithmetic number, because the mean of its divisors is an integer number (211094100).

Almost surely, 2^1671653617 is an apocalyptic number.

It is an amenable number.

1671653617 is a deficient number, since it is larger than the sum of its proper divisors (17099183).

1671653617 is a wasteful number, since it uses less digits than its factorization.

1671653617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13775.

The product of its digits is 158760, while the sum is 43.

The square root of 1671653617 is about 40885.8608445511. The cubic root of 1671653617 is about 1186.8124606864.

The spelling of 1671653617 in words is "one billion, six hundred seventy-one million, six hundred fifty-three thousand, six hundred seventeen".