671271070557 has 4 divisors (see below), whose sum is σ = 895028094080. Its totient is φ = 447514047036.

The previous prime is 671271070529. The next prime is 671271070597. The reversal of 671271070557 is 755070172176.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 671271070557 - 2⁶ = 671271070493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671271070507) 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, 111878511757 + ... + 111878511762.

It is an arithmetic number, because the mean of its divisors is an integer number (223757023520).

Almost surely, 2^671271070557 is an apocalyptic number.

It is an amenable number.

671271070557 is a deficient number, since it is larger than the sum of its proper divisors (223757023523).

671271070557 is a wasteful number, since it uses less digits than its factorization.

671271070557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223757023522.

The product of its (nonzero) digits is 720300, while the sum is 48.

The spelling of 671271070557 in words is "six hundred seventy-one billion, two hundred seventy-one million, seventy thousand, five hundred fifty-seven".