128357633640212 has 24 divisors (see below), whose sum is σ = 225510502152936. Its totient is φ = 63926430317568.

The previous prime is 128357633640149. The next prime is 128357633640287. The reversal of 128357633640212 is 212046336753821.

It can be written as a sum of positive squares in 4 ways, for example, as 80125664274436 + 48231969365776 = 8951294^2 + 6944924^2 .

It is a super-2 number, since 2×128357633640212² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44696963 + ... + 47481930.

It is an arithmetic number, because the mean of its divisors is an integer number (9396270923039).

Almost surely, 2^{128357633640212} is an apocalyptic number.

It is an amenable number.

128357633640212 is a deficient number, since it is larger than the sum of its proper divisors (97152868512724).

128357633640212 is a wasteful number, since it uses less digits than its factorization.

128357633640212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92180267 (or 92180265 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 53.

The spelling of 128357633640212 in words is "one hundred twenty-eight trillion, three hundred fifty-seven billion, six hundred thirty-three million, six hundred forty thousand, two hundred twelve".