128671206490 has 8 divisors (see below), whose sum is σ = 231608171700. Its totient is φ = 51468482592.

The previous prime is 128671206481. The next prime is 128671206527. The reversal of 128671206490 is 94602176821.

It can be written as a sum of positive squares in 2 ways, for example, as 107899767361 + 20771439129 = 328481^2 + 144123^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 128671206490.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6433560315 + ... + 6433560334.

Almost surely, 2^128671206490 is an apocalyptic number.

128671206490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128671206490 is a deficient number, since it is larger than the sum of its proper divisors (102936965210).

128671206490 is a wasteful number, since it uses less digits than its factorization.

128671206490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12867120656.

The product of its (nonzero) digits is 290304, while the sum is 46.

The spelling of 128671206490 in words is "one hundred twenty-eight billion, six hundred seventy-one million, two hundred six thousand, four hundred ninety".