671603296320 has 560 divisors, whose sum is σ = 2626234560576. Its totient is φ = 161561088000.

The previous prime is 671603296319. The next prime is 671603296361. The reversal of 671603296320 is 23692306176.

671603296320 is a `hidden beast` number, since 6 + 7 + 1 + 6 + 0 + 3 + 2 + 9 + 632 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 37341730 + ... + 37359710.

Almost surely, 2^671603296320 is an apocalyptic number.

671603296320 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 671603296320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1313117280288).

671603296320 is an abundant number, since it is smaller than the sum of its proper divisors (1954631264256).

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

671603296320 is a wasteful number, since it uses less digits than its factorization.

671603296320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18152 (or 18133 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 45.

The spelling of 671603296320 in words is "six hundred seventy-one billion, six hundred three million, two hundred ninety-six thousand, three hundred twenty".