122555740647 has 4 divisors (see below), whose sum is σ = 163407654200. Its totient is φ = 81703827096.

The previous prime is 122555740639. The next prime is 122555740651. The reversal of 122555740647 is 746047555221.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 122555740647 - 2³ = 122555740639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122555740596 and 122555740605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122555340647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20425956772 + ... + 20425956777.

It is an arithmetic number, because the mean of its divisors is an integer number (40851913550).

Almost surely, 2^122555740647 is an apocalyptic number.

122555740647 is a deficient number, since it is larger than the sum of its proper divisors (40851913553).

122555740647 is an equidigital number, since it uses as much as digits as its factorization.

122555740647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40851913552.

The product of its (nonzero) digits is 2352000, while the sum is 48.

The spelling of 122555740647 in words is "one hundred twenty-two billion, five hundred fifty-five million, seven hundred forty thousand, six hundred forty-seven".