122745725520 has 80 divisors (see below), whose sum is σ = 415103735232. Its totient is φ = 29756538880.

The previous prime is 122745725497. The next prime is 122745725521. The reversal of 122745725520 is 25527547221.

122745725520 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122745725521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23244657 + ... + 23249936.

Almost surely, 2^122745725520 is an apocalyptic number.

122745725520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122745725520 is an abundant number, since it is smaller than the sum of its proper divisors (292358009712).

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

122745725520 is a wasteful number, since it uses less digits than its factorization.

122745725520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46494620 (or 46494614 counting only the distinct ones).

The product of its (nonzero) digits is 392000, while the sum is 42.

The spelling of 122745725520 in words is "one hundred twenty-two billion, seven hundred forty-five million, seven hundred twenty-five thousand, five hundred twenty".