128261027332156 has 24 divisors (see below), whose sum is σ = 224962719115680. Its totient is φ = 63986032399872.

The previous prime is 128261027332153. The next prime is 128261027332183. The reversal of 128261027332156 is 651233720162821.

It is a super-2 number, since 2×128261027332156² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128261027332153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 873661 + ... + 16040116.

It is an arithmetic number, because the mean of its divisors is an integer number (9373446629820).

Almost surely, 2^{128261027332156} is an apocalyptic number.

It is an amenable number.

128261027332156 is a deficient number, since it is larger than the sum of its proper divisors (96701691783524).

128261027332156 is a wasteful number, since it uses less digits than its factorization.

128261027332156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16918053 (or 16918051 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 49.

Adding to 128261027332156 its reverse (651233720162821), we get a palindrome (779494747494977).

The spelling of 128261027332156 in words is "one hundred twenty-eight trillion, two hundred sixty-one billion, twenty-seven million, three hundred thirty-two thousand, one hundred fifty-six".