128769409126 has 8 divisors (see below), whose sum is σ = 201552118704. Its totient is φ = 61585369560.

The previous prime is 128769409049. The next prime is 128769409127. The reversal of 128769409126 is 621904967821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×128769409126³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128769409127) 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, 1399667445 + ... + 1399667536.

It is an arithmetic number, because the mean of its divisors is an integer number (25194014838).

Almost surely, 2^128769409126 is an apocalyptic number.

128769409126 is a deficient number, since it is larger than the sum of its proper divisors (72782709578).

128769409126 is a wasteful number, since it uses less digits than its factorization.

128769409126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2799335006.

The product of its (nonzero) digits is 2612736, while the sum is 55.

The spelling of 128769409126 in words is "one hundred twenty-eight billion, seven hundred sixty-nine million, four hundred nine thousand, one hundred twenty-six".