128612607877 has 8 divisors (see below), whose sum is σ = 143281950840. Its totient is φ = 114625560000.

The previous prime is 128612607869. The next prime is 128612607889. The reversal of 128612607877 is 778706216821.

It is a Cunningham number, because it is equal to 358626²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 19025788356 + 109586819521 = 137934^2 + 331039^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 128612607877 - 2³ = 128612607869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128612607847) 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, 170573374 + ... + 170574127.

It is an arithmetic number, because the mean of its divisors is an integer number (17910243855).

Almost surely, 2^128612607877 is an apocalyptic number.

It is an amenable number.

128612607877 is a deficient number, since it is larger than the sum of its proper divisors (14669342963).

128612607877 is a wasteful number, since it uses less digits than its factorization.

128612607877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341147543.

The product of its (nonzero) digits is 3161088, while the sum is 55.

The spelling of 128612607877 in words is "one hundred twenty-eight billion, six hundred twelve million, six hundred seven thousand, eight hundred seventy-seven".