122557444065 has 80 divisors (see below), whose sum is σ = 255818331648. Its totient is φ = 54969093504.

The previous prime is 122557444049. The next prime is 122557444183. The reversal of 122557444065 is 560444755221.

122557444065 is a `hidden beast` number, since 12 + 2 + 5 + 574 + 4 + 4 + 0 + 65 = 666.

It is not a de Polignac number, because 122557444065 - 2⁴ = 122557444049 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 122557444065.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 257577 + ... + 558086.

Almost surely, 2^122557444065 is an apocalyptic number.

122557444065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

122557444065 is an abundant number, since it is smaller than the sum of its proper divisors (133260887583).

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

122557444065 is an equidigital number, since it uses as much as digits as its factorization.

122557444065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815740 (or 815731 counting only the distinct ones).

The product of its (nonzero) digits is 1344000, while the sum is 45.

The spelling of 122557444065 in words is "one hundred twenty-two billion, five hundred fifty-seven million, four hundred forty-four thousand, sixty-five".