671442143040 has 896 divisors, whose sum is σ = 2559076416000. Its totient is φ = 165208522752.

The previous prime is 671442143017. The next prime is 671442143069. The reversal of 671442143040 is 40341244176.

671442143040 is a `hidden beast` number, since 6 + 71 + 442 + 143 + 0 + 4 + 0 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 671442142986 and 671442143004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1992409752 + ... + 1992410088.

Almost surely, 2^671442143040 is an apocalyptic number.

671442143040 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 671442143040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1279538208000).

671442143040 is an abundant number, since it is smaller than the sum of its proper divisors (1887634272960).

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

671442143040 is a wasteful number, since it uses less digits than its factorization.

671442143040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664 (or 648 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 36.

The spelling of 671442143040 in words is "six hundred seventy-one billion, four hundred forty-two million, one hundred forty-three thousand, forty".