122776656 has 80 divisors (see below), whose sum is σ = 330556224. Its totient is φ = 39232512.

The previous prime is 122776639. The next prime is 122776663. The reversal of 122776656 is 656677221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129175 + ... + 130121.

Almost surely, 2^122776656 is an apocalyptic number.

122776656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 122776656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165278112).

122776656 is an abundant number, since it is smaller than the sum of its proper divisors (207779568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

122776656 is a wasteful number, since it uses less digits than its factorization.

122776656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1068 (or 1062 counting only the distinct ones).

The product of its digits is 211680, while the sum is 42.

The square root of 122776656 is about 11080.4628062189. The cubic root of 122776656 is about 497.0177895382.

The spelling of 122776656 in words is "one hundred twenty-two million, seven hundred seventy-six thousand, six hundred fifty-six".