128203191405 has 24 divisors (see below), whose sum is σ = 222227430048. Its totient is φ = 68372400096.

The previous prime is 128203191401. The next prime is 128203191497. The reversal of 128203191405 is 504191302821.

It is not a de Polignac number, because 128203191405 - 2² = 128203191401 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128203191405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128203191401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1858054 + ... + 1925816.

It is an arithmetic number, because the mean of its divisors is an integer number (9259476252).

Almost surely, 2^128203191405 is an apocalyptic number.

128203191405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

128203191405 is a deficient number, since it is larger than the sum of its proper divisors (94024238643).

128203191405 is a wasteful number, since it uses less digits than its factorization.

128203191405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109817 (or 109814 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The spelling of 128203191405 in words is "one hundred twenty-eight billion, two hundred three million, one hundred ninety-one thousand, four hundred five".