128732613406 has 4 divisors (see below), whose sum is σ = 193098920112. Its totient is φ = 64366306702.

The previous prime is 128732613389. The next prime is 128732613437. The reversal of 128732613406 is 604316237821.

It is a semiprime because it is the product of two primes.

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 as a sum of consecutive naturals, namely, 32183153350 + ... + 32183153353.

It is an arithmetic number, because the mean of its divisors is an integer number (48274730028).

Almost surely, 2^128732613406 is an apocalyptic number.

128732613406 is a deficient number, since it is larger than the sum of its proper divisors (64366306706).

128732613406 is an equidigital number, since it uses as much as digits as its factorization.

128732613406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64366306705.

The product of its (nonzero) digits is 290304, while the sum is 43.

The spelling of 128732613406 in words is "one hundred twenty-eight billion, seven hundred thirty-two million, six hundred thirteen thousand, four hundred six".