1671605001 has 36 divisors (see below), whose sum is σ = 2685127536. Its totient is φ = 993813600.

The previous prime is 1671604997. The next prime is 1671605057. The reversal of 1671605001 is 1005061761.

It is not a de Polignac number, because 1671605001 - 2² = 1671604997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1671605071) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 275086 + ... + 281096.

It is an arithmetic number, because the mean of its divisors is an integer number (74586876).

Almost surely, 2^1671605001 is an apocalyptic number.

1671605001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1671605001 is a deficient number, since it is larger than the sum of its proper divisors (1013522535).

1671605001 is a wasteful number, since it uses less digits than its factorization.

1671605001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6134 (or 6078 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 1671605001 is about 40885.2663070696. The cubic root of 1671605001 is about 1186.8009553855.

Adding to 1671605001 its reverse (1005061761), we get a palindrome (2676666762).

The spelling of 1671605001 in words is "one billion, six hundred seventy-one million, six hundred five thousand, one".