128731676215 has 8 divisors (see below), whose sum is σ = 154480602960. Its totient is φ = 102983613312.

The previous prime is 128731676159. The next prime is 128731676219. The reversal of 128731676215 is 512676137821.

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-128731676215 is a prime.

It is a super-2 number, since 2×128731676215² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128731676219) 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, 176847 + ... + 537343.

It is an arithmetic number, because the mean of its divisors is an integer number (19310075370).

Almost surely, 2^128731676215 is an apocalyptic number.

128731676215 is a deficient number, since it is larger than the sum of its proper divisors (25748926745).

128731676215 is an equidigital number, since it uses as much as digits as its factorization.

128731676215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431921.

The product of its digits is 846720, while the sum is 49.

The spelling of 128731676215 in words is "one hundred twenty-eight billion, seven hundred thirty-one million, six hundred seventy-six thousand, two hundred fifteen".