128674625687 has 8 divisors (see below), whose sum is σ = 133125265920. Its totient is φ = 124242725880.

The previous prime is 128674625663. The next prime is 128674625759. The reversal of 128674625687 is 786526476821.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128674625687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128674625627) 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, 4671137 + ... + 4698602.

It is an arithmetic number, because the mean of its divisors is an integer number (16640658240).

Almost surely, 2^128674625687 is an apocalyptic number.

128674625687 is a deficient number, since it is larger than the sum of its proper divisors (4450640233).

128674625687 is an equidigital number, since it uses as much as digits as its factorization.

128674625687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9370213.

The product of its digits is 54190080, while the sum is 62.

The spelling of 128674625687 in words is "one hundred twenty-eight billion, six hundred seventy-four million, six hundred twenty-five thousand, six hundred eighty-seven".