671214771880 has 16 divisors (see below), whose sum is σ = 1510233236820. Its totient is φ = 268485908736.

The previous prime is 671214771859. The next prime is 671214772009. The reversal of 671214771880 is 88177412176.

It can be written as a sum of positive squares in 2 ways, for example, as 666675516004 + 4539255876 = 816502^2 + 67374^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8390184609 + ... + 8390184688.

Almost surely, 2^671214771880 is an apocalyptic number.

It is an amenable number.

671214771880 is an abundant number, since it is smaller than the sum of its proper divisors (839018464940).

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

671214771880 is a wasteful number, since it uses less digits than its factorization.

671214771880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16780369308 (or 16780369304 counting only the distinct ones).

The product of its (nonzero) digits is 1053696, while the sum is 52.

The spelling of 671214771880 in words is "six hundred seventy-one billion, two hundred fourteen million, seven hundred seventy-one thousand, eight hundred eighty".