123271281616 has 20 divisors (see below), whose sum is σ = 272957838112. Its totient is φ = 52830549216.

The previous prime is 123271281611. The next prime is 123271281677. The reversal of 123271281616 is 616182172321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123271281611) 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, 550318110 + ... + 550318333.

Almost surely, 2^123271281616 is an apocalyptic number.

123271281616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

123271281616 is an abundant number, since it is smaller than the sum of its proper divisors (149686556496).

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

123271281616 is a wasteful number, since it uses less digits than its factorization.

123271281616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100636458 (or 1100636452 counting only the distinct ones).

The product of its digits is 48384, while the sum is 40.

The spelling of 123271281616 in words is "one hundred twenty-three billion, two hundred seventy-one million, two hundred eighty-one thousand, six hundred sixteen".