128711530067642 has 4 divisors (see below), whose sum is σ = 193067295101466. Its totient is φ = 64355765033820.

The previous prime is 128711530067579. The next prime is 128711530067677. The reversal of 128711530067642 is 246760035117821.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 126642590166481 + 2068939901161 = 11253559^2 + 1438381^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32177882516909 + ... + 32177882516912.

Almost surely, 2^{128711530067642} is an apocalyptic number.

128711530067642 is a deficient number, since it is larger than the sum of its proper divisors (64355765033824).

128711530067642 is an equidigital number, since it uses as much as digits as its factorization.

128711530067642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64355765033823.

The product of its (nonzero) digits is 3386880, while the sum is 53.

The spelling of 128711530067642 in words is "one hundred twenty-eight trillion, seven hundred eleven billion, five hundred thirty million, sixty-seven thousand, six hundred forty-two".