671885987390 has 16 divisors (see below), whose sum is σ = 1209510619632. Its totient is φ = 268728652224.

The previous prime is 671885987347. The next prime is 671885987411. The reversal of 671885987390 is 93789588176.

It is a congruent number.

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, 3108044 + ... + 3317183.

It is an arithmetic number, because the mean of its divisors is an integer number (75594413727).

Almost surely, 2^671885987390 is an apocalyptic number.

671885987390 is a deficient number, since it is larger than the sum of its proper divisors (537624632242).

671885987390 is a wasteful number, since it uses less digits than its factorization.

671885987390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6435691.

The product of its (nonzero) digits is 182891520, while the sum is 71.

The spelling of 671885987390 in words is "six hundred seventy-one billion, eight hundred eighty-five million, nine hundred eighty-seven thousand, three hundred ninety".