671782157632 has 14 divisors (see below), whose sum is σ = 1333067719178. Its totient is φ = 335891078784.

The previous prime is 671782157621. The next prime is 671782157693. The reversal of 671782157632 is 236751287176.

It can be written as a sum of positive squares in only one way, i.e., 558331750656 + 113450406976 = 747216^2 + 336824^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5248298043 + ... + 5248298170.

Almost surely, 2^671782157632 is an apocalyptic number.

It is an amenable number.

671782157632 is a deficient number, since it is larger than the sum of its proper divisors (661285561546).

671782157632 is a wasteful number, since it uses less digits than its factorization.

671782157632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10496596225 (or 10496596215 counting only the distinct ones).

The product of its digits is 5927040, while the sum is 55.

The spelling of 671782157632 in words is "six hundred seventy-one billion, seven hundred eighty-two million, one hundred fifty-seven thousand, six hundred thirty-two".