123571670871 has 32 divisors (see below), whose sum is σ = 186085785600. Its totient is φ = 72252190080.

The previous prime is 123571670867. The next prime is 123571670879. The reversal of 123571670871 is 178076175321.

It is not a de Polignac number, because 123571670871 - 2² = 123571670867 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123571670871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123571670879) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1173525 + ... + 1274481.

It is an arithmetic number, because the mean of its divisors is an integer number (5815180800).

Almost surely, 2^123571670871 is an apocalyptic number.

123571670871 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

123571670871 is a deficient number, since it is larger than the sum of its proper divisors (62514114729).

123571670871 is a wasteful number, since it uses less digits than its factorization.

123571670871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102279.

The product of its (nonzero) digits is 493920, while the sum is 48.

The spelling of 123571670871 in words is "one hundred twenty-three billion, five hundred seventy-one million, six hundred seventy thousand, eight hundred seventy-one".