671815204356 has 24 divisors (see below), whose sum is σ = 1567636013440. Its totient is φ = 223928800992.

The previous prime is 671815204337. The next prime is 671815204447. The reversal of 671815204356 is 653402518176.

671815204356 is digitally balanced in base 2, base 4 and base 7, because in such bases it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 905596 + ... + 1470963.

Almost surely, 2^671815204356 is an apocalyptic number.

It is an amenable number.

671815204356 is an abundant number, since it is smaller than the sum of its proper divisors (895820809084).

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

671815204356 is a wasteful number, since it uses less digits than its factorization.

671815204356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2400123 (or 2400121 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 48.

The spelling of 671815204356 in words is "six hundred seventy-one billion, eight hundred fifteen million, two hundred four thousand, three hundred fifty-six".