122775340561 has 8 divisors (see below), whose sum is σ = 124806409448. Its totient is φ = 120744864000.

The previous prime is 122775340559. The next prime is 122775340577. The reversal of 122775340561 is 165043577221.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 31740985600 + 91034354961 = 178160^2 + 301719^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 122775340561 - 2¹ = 122775340559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122775340661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 280051 + ... + 569191.

It is an arithmetic number, because the mean of its divisors is an integer number (15600801181).

Almost surely, 2^122775340561 is an apocalyptic number.

It is an amenable number.

122775340561 is a deficient number, since it is larger than the sum of its proper divisors (2031068887).

122775340561 is an equidigital number, since it uses as much as digits as its factorization.

122775340561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296163.

The product of its (nonzero) digits is 352800, while the sum is 43.

The spelling of 122775340561 in words is "one hundred twenty-two billion, seven hundred seventy-five million, three hundred forty thousand, five hundred sixty-one".