128277620334502 has 4 divisors (see below), whose sum is σ = 192416430501756. Its totient is φ = 64138810167250.

The previous prime is 128277620334497. The next prime is 128277620334529. The reversal of 128277620334502 is 205433026772821.

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

It is a self number, because there is not a number n which added to its sum of digits gives 128277620334502.

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, 32069405083624 + ... + 32069405083627.

It is an arithmetic number, because the mean of its divisors is an integer number (48104107625439).

Almost surely, 2^{128277620334502} is an apocalyptic number.

128277620334502 is a deficient number, since it is larger than the sum of its proper divisors (64138810167254).

128277620334502 is an equidigital number, since it uses as much as digits as its factorization.

128277620334502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64138810167253.

The product of its (nonzero) digits is 6773760, while the sum is 52.

The spelling of 128277620334502 in words is "one hundred twenty-eight trillion, two hundred seventy-seven billion, six hundred twenty million, three hundred thirty-four thousand, five hundred two".