122777507557 has 4 divisors (see below), whose sum is σ = 124256754720. Its totient is φ = 121298260396.

The previous prime is 122777507527. The next prime is 122777507581. The reversal of 122777507557 is 755705777221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 122777507557 - 2¹¹ = 122777505509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122777507498 and 122777507507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122777507527) 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, 739623457 + ... + 739623622.

It is an arithmetic number, because the mean of its divisors is an integer number (31064188680).

Almost surely, 2^122777507557 is an apocalyptic number.

It is an amenable number.

122777507557 is a deficient number, since it is larger than the sum of its proper divisors (1479247163).

122777507557 is an equidigital number, since it uses as much as digits as its factorization.

122777507557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1479247162.

The product of its (nonzero) digits is 8403500, while the sum is 55.

The spelling of 122777507557 in words is "one hundred twenty-two billion, seven hundred seventy-seven million, five hundred seven thousand, five hundred fifty-seven".