1671638036 has 12 divisors (see below), whose sum is σ = 2926573440. Its totient is φ = 835474200.

The previous prime is 1671637997. The next prime is 1671638053. The reversal of 1671638036 is 6308361761.

It is a junction number, because it is equal to n+sod(n) for n = 1671637984 and 1671638002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75140 + ... + 94811.

It is an arithmetic number, because the mean of its divisors is an integer number (243881120).

Almost surely, 2^1671638036 is an apocalyptic number.

It is an amenable number.

1671638036 is a deficient number, since it is larger than the sum of its proper divisors (1254935404).

1671638036 is a wasteful number, since it uses less digits than its factorization.

1671638036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172414 (or 172412 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 1671638036 is about 40885.6703014638. The cubic root of 1671638036 is about 1186.8087733630.

Adding to 1671638036 its reverse (6308361761), we get a palindrome (7979999797).

The spelling of 1671638036 in words is "one billion, six hundred seventy-one million, six hundred thirty-eight thousand, thirty-six".