671549232720 has 160 divisors (see below), whose sum is σ = 2121690703104. Its totient is φ = 175650508800.

The previous prime is 671549232707. The next prime is 671549232737. The reversal of 671549232720 is 27232945176.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 671549232720.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 69077460 + ... + 69087180.

Almost surely, 2^671549232720 is an apocalyptic number.

671549232720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 671549232720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1060845351552).

671549232720 is an abundant number, since it is smaller than the sum of its proper divisors (1450141470384).

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

671549232720 is a wasteful number, since it uses less digits than its factorization.

671549232720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15221 (or 15215 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 48.

The spelling of 671549232720 in words is "six hundred seventy-one billion, five hundred forty-nine million, two hundred thirty-two thousand, seven hundred twenty".