671624415840 has 192 divisors, whose sum is σ = 2418320572416. Its totient is φ = 153484142592.

The previous prime is 671624415779. The next prime is 671624415851. The reversal of 671624415840 is 48514426176.

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 671624415840.

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, 20321569 + ... + 20354591.

It is an arithmetic number, because the mean of its divisors is an integer number (12595419648).

Almost surely, 2^671624415840 is an apocalyptic number.

671624415840 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 671624415840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1209160286208).

671624415840 is an abundant number, since it is smaller than the sum of its proper divisors (1746696156576).

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

671624415840 is a wasteful number, since it uses less digits than its factorization.

671624415840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39101 (or 39093 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 48.

The spelling of 671624415840 in words is "six hundred seventy-one billion, six hundred twenty-four million, four hundred fifteen thousand, eight hundred forty".