128889859157 has 8 divisors (see below), whose sum is σ = 138341091096. Its totient is φ = 119646346752.

The previous prime is 128889859139. The next prime is 128889859193. The reversal of 128889859157 is 751958988821.

It can be written as a sum of positive squares in 4 ways, for example, as 76066191601 + 52823667556 = 275801^2 + 229834^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 128889859157 - 2⁶ = 128889859093 is a prime.

It is a super-2 number, since 2×128889859157² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128889859117) 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, 51928598 + ... + 51931079.

It is an arithmetic number, because the mean of its divisors is an integer number (17292636387).

Almost surely, 2^128889859157 is an apocalyptic number.

128889859157 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

128889859157 is a deficient number, since it is larger than the sum of its proper divisors (9451231939).

128889859157 is a wasteful number, since it uses less digits than its factorization.

128889859157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103859767.

The product of its digits is 116121600, while the sum is 71.

The spelling of 128889859157 in words is "one hundred twenty-eight billion, eight hundred eighty-nine million, eight hundred fifty-nine thousand, one hundred fifty-seven".