129775227276 has 24 divisors (see below), whose sum is σ = 302816747520. Its totient is φ = 43257282832.

The previous prime is 129775227271. The next prime is 129775227343. The reversal of 129775227276 is 672722577921.

It is a super-2 number, since 2×129775227276² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (129775227271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 432805 + ... + 668483.

It is an arithmetic number, because the mean of its divisors is an integer number (12617364480).

Almost surely, 2^129775227276 is an apocalyptic number.

It is an amenable number.

129775227276 is an abundant number, since it is smaller than the sum of its proper divisors (173041520244).

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

129775227276 is a wasteful number, since it uses less digits than its factorization.

129775227276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281573 (or 281571 counting only the distinct ones).

The product of its digits is 10372320, while the sum is 57.

The spelling of 129775227276 in words is "one hundred twenty-nine billion, seven hundred seventy-five million, two hundred twenty-seven thousand, two hundred seventy-six".