671322456138 has 8 divisors (see below), whose sum is σ = 1342644912288. Its totient is φ = 223774152044.

The previous prime is 671322456137. The next prime is 671322456197. The reversal of 671322456138 is 831654223176.

671322456138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

671322456138 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (671322456137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55943538006 + ... + 55943538017.

It is an arithmetic number, because the mean of its divisors is an integer number (167830614036).

Almost surely, 2^671322456138 is an apocalyptic number.

671322456138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

671322456138 is a wasteful number, since it uses less digits than its factorization.

671322456138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111887076028.

The product of its digits is 1451520, while the sum is 48.

The spelling of 671322456138 in words is "six hundred seventy-one billion, three hundred twenty-two million, four hundred fifty-six thousand, one hundred thirty-eight".