122685780047 has 4 divisors (see below), whose sum is σ = 129902590656. Its totient is φ = 115468969440.

The previous prime is 122685779969. The next prime is 122685780071. The reversal of 122685780047 is 740087586221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 740087586221 = 109 ⋅6789794369.

It is not a de Polignac number, because 122685780047 - 2¹⁰ = 122685779023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122685779977 and 122685780004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122685780097) 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, 3608405279 + ... + 3608405312.

It is an arithmetic number, because the mean of its divisors is an integer number (32475647664).

Almost surely, 2^122685780047 is an apocalyptic number.

122685780047 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

122685780047 is a deficient number, since it is larger than the sum of its proper divisors (7216810609).

122685780047 is an equidigital number, since it uses as much as digits as its factorization.

122685780047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7216810608.

The product of its (nonzero) digits is 1505280, while the sum is 50.

The spelling of 122685780047 in words is "one hundred twenty-two billion, six hundred eighty-five million, seven hundred eighty thousand, forty-seven".