128699740238 has 4 divisors (see below), whose sum is σ = 193049610360. Its totient is φ = 64349870118.

The previous prime is 128699740207. The next prime is 128699740259. The reversal of 128699740238 is 832047996821.

It is a happy number.

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 polite number, since it can be written as a sum of consecutive naturals, namely, 32174935058 + ... + 32174935061.

It is an arithmetic number, because the mean of its divisors is an integer number (48262402590).

Almost surely, 2^128699740238 is an apocalyptic number.

128699740238 is a deficient number, since it is larger than the sum of its proper divisors (64349870122).

128699740238 is an equidigital number, since it uses as much as digits as its factorization.

128699740238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64349870121.

The product of its (nonzero) digits is 10450944, while the sum is 59.

The spelling of 128699740238 in words is "one hundred twenty-eight billion, six hundred ninety-nine million, seven hundred forty thousand, two hundred thirty-eight".