671532636 has 24 divisors (see below), whose sum is σ = 1577290624. Its totient is φ = 222361200.

The previous prime is 671532629. The next prime is 671532643. The reversal of 671532636 is 636235176.

It is an interprime number because it is at equal distance from previous prime (671532629) and next prime (671532643).

It is a junction number, because it is equal to n+sod(n) for n = 671532594 and 671532603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183490 + ... + 187113.

Almost surely, 2^671532636 is an apocalyptic number.

It is an amenable number.

671532636 is an abundant number, since it is smaller than the sum of its proper divisors (905757988).

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

671532636 is a wasteful number, since it uses less digits than its factorization.

671532636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370761 (or 370759 counting only the distinct ones).

The product of its digits is 136080, while the sum is 39.

The square root of 671532636 is about 25913.9467468774. The cubic root of 671532636 is about 875.7007223945.

The spelling of 671532636 in words is "six hundred seventy-one million, five hundred thirty-two thousand, six hundred thirty-six".