671323521024 has 520 divisors, whose sum is σ = 2273648278440. Its totient is φ = 195689447424.

The previous prime is 671323520969. The next prime is 671323521047. The reversal of 671323521024 is 420125323176.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 671323521024.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 35332816887 + ... + 35332816905.

Almost surely, 2^671323521024 is an apocalyptic number.

671323521024 is a gapful number since it is divisible by the number (64) 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 671323521024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1136824139220).

671323521024 is an abundant number, since it is smaller than the sum of its proper divisors (1602324757416).

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

671323521024 is an frugal number, since it uses more digits than its factorization.

671323521024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94 (or 37 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The spelling of 671323521024 in words is "six hundred seventy-one billion, three hundred twenty-three million, five hundred twenty-one thousand, twenty-four".