122731257855 has 16 divisors (see below), whose sum is σ = 197250600960. Its totient is φ = 65163141408.

The previous prime is 122731257769. The next prime is 122731257871. The reversal of 122731257855 is 558752137221.

It is not a de Polignac number, because 122731257855 - 2¹² = 122731253759 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18342135 + ... + 18348824.

It is an arithmetic number, because the mean of its divisors is an integer number (12328162560).

Almost surely, 2^122731257855 is an apocalyptic number.

122731257855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

122731257855 is a deficient number, since it is larger than the sum of its proper divisors (74519343105).

122731257855 is a wasteful number, since it uses less digits than its factorization.

122731257855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36691190.

The product of its digits is 1176000, while the sum is 48.

The spelling of 122731257855 in words is "one hundred twenty-two billion, seven hundred thirty-one million, two hundred fifty-seven thousand, eight hundred fifty-five".