671424531440 has 160 divisors (see below), whose sum is σ = 1687916966400. Its totient is φ = 246914150400.

The previous prime is 671424531431. The next prime is 671424531461. The reversal of 671424531440 is 44135424176.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 353194490 + ... + 353196390.

It is an arithmetic number, because the mean of its divisors is an integer number (10549481040).

Almost surely, 2^671424531440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 671424531440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (843958483200).

671424531440 is an abundant number, since it is smaller than the sum of its proper divisors (1016492434960).

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

671424531440 is a wasteful number, since it uses less digits than its factorization.

671424531440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3115 (or 3109 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 41.

The spelling of 671424531440 in words is "six hundred seventy-one billion, four hundred twenty-four million, five hundred thirty-one thousand, four hundred forty".