122557142456 has 32 divisors (see below), whose sum is σ = 266321364480. Its totient is φ = 51784706400.

The previous prime is 122557142447. The next prime is 122557142459. The reversal of 122557142456 is 654241755221.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122557142459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15408140 + ... + 15416091.

It is an arithmetic number, because the mean of its divisors is an integer number (8322542640).

Almost surely, 2^122557142456 is an apocalyptic number.

It is an amenable number.

122557142456 is an abundant number, since it is smaller than the sum of its proper divisors (143764222024).

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

122557142456 is a wasteful number, since it uses less digits than its factorization.

122557142456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30824315 (or 30824311 counting only the distinct ones).

The product of its digits is 672000, while the sum is 44.

Adding to 122557142456 its reverse (654241755221), we get a palindrome (776798897677).

The spelling of 122557142456 in words is "one hundred twenty-two billion, five hundred fifty-seven million, one hundred forty-two thousand, four hundred fifty-six".