671761632480 has 288 divisors, whose sum is σ = 2196022026240. Its totient is φ = 172432419840.

The previous prime is 671761632469. The next prime is 671761632497. The reversal of 671761632480 is 84236167176.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1402424881 + ... + 1402425359.

It is an arithmetic number, because the mean of its divisors is an integer number (7625076480).

Almost surely, 2^671761632480 is an apocalyptic number.

671761632480 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 671761632480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1098011013120).

671761632480 is an abundant number, since it is smaller than the sum of its proper divisors (1524260393760).

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

671761632480 is a wasteful number, since it uses less digits than its factorization.

671761632480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1142 (or 827 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 51.

The spelling of 671761632480 in words is "six hundred seventy-one billion, seven hundred sixty-one million, six hundred thirty-two thousand, four hundred eighty".