671530436478 has 72 divisors (see below), whose sum is σ = 1611487325448. Its totient is φ = 201940596000.

The previous prime is 671530436471. The next prime is 671530436483. The reversal of 671530436478 is 874634035176.

It is a happy number.

671530436478 is a `hidden beast` number, since 6 + 7 + 1 + 530 + 4 + 36 + 4 + 78 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671530436471) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 891493 + ... + 1462128.

It is an arithmetic number, because the mean of its divisors is an integer number (22381768409).

Almost surely, 2^671530436478 is an apocalyptic number.

671530436478 is an abundant number, since it is smaller than the sum of its proper divisors (939956888970).

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

671530436478 is a wasteful number, since it uses less digits than its factorization.

671530436478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2353782 (or 2353768 counting only the distinct ones).

The product of its (nonzero) digits is 10160640, while the sum is 54.

The spelling of 671530436478 in words is "six hundred seventy-one billion, five hundred thirty million, four hundred thirty-six thousand, four hundred seventy-eight".