671425456 has 80 divisors (see below), whose sum is σ = 1442657664. Its totient is φ = 300782592.

The previous prime is 671425451. The next prime is 671425501. The reversal of 671425456 is 654524176.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (671425451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1691050 + ... + 1691446.

Almost surely, 2^671425456 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 671425456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (721328832).

671425456 is an abundant number, since it is smaller than the sum of its proper divisors (771232208).

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

671425456 is a wasteful number, since it uses less digits than its factorization.

671425456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638 (or 632 counting only the distinct ones).

The product of its digits is 201600, while the sum is 40.

The square root of 671425456 is about 25911.8786659709. The cubic root of 671425456 is about 875.6541311631.

The spelling of 671425456 in words is "six hundred seventy-one million, four hundred twenty-five thousand, four hundred fifty-six".