128677470242 has 8 divisors (see below), whose sum is σ = 198232859676. Its totient is φ = 62599850352.

The previous prime is 128677470217. The next prime is 128677470281. The reversal of 128677470242 is 242074776821.

It can be written as a sum of positive squares in 2 ways, for example, as 128436941161 + 240529081 = 358381^2 + 15509^2 .

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

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, 869442293 + ... + 869442440.

Almost surely, 2^128677470242 is an apocalyptic number.

128677470242 is a deficient number, since it is larger than the sum of its proper divisors (69555389434).

128677470242 is a wasteful number, since it uses less digits than its factorization.

128677470242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1738884772.

The product of its (nonzero) digits is 2107392, while the sum is 50.

The spelling of 128677470242 in words is "one hundred twenty-eight billion, six hundred seventy-seven million, four hundred seventy thousand, two hundred forty-two".