122778130657 has 16 divisors (see below), whose sum is σ = 151238344320. Its totient is φ = 97061622912.

The previous prime is 122778130637. The next prime is 122778130679. The reversal of 122778130657 is 756031877221.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 122778130657 - 2¹¹ = 122778128609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 122778130657.

It is not an unprimeable number, because it can be changed into a prime (122778130637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 456907 + ... + 674032.

It is an arithmetic number, because the mean of its divisors is an integer number (9452396520).

Almost surely, 2^122778130657 is an apocalyptic number.

It is an amenable number.

122778130657 is a deficient number, since it is larger than the sum of its proper divisors (28460213663).

122778130657 is a wasteful number, since it uses less digits than its factorization.

122778130657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1132152.

The product of its (nonzero) digits is 987840, while the sum is 49.

The spelling of 122778130657 in words is "one hundred twenty-two billion, seven hundred seventy-eight million, one hundred thirty thousand, six hundred fifty-seven".