128277874500878 has 4 divisors (see below), whose sum is σ = 192416811751320. Its totient is φ = 64138937250438.

The previous prime is 128277874500817. The next prime is 128277874500887. The reversal of 128277874500878 is 878005478772821.

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

It is a Curzon number.

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, 32069468625218 + ... + 32069468625221.

It is an arithmetic number, because the mean of its divisors is an integer number (48104202937830).

Almost surely, 2^{128277874500878} is an apocalyptic number.

128277874500878 is a deficient number, since it is larger than the sum of its proper divisors (64138937250442).

128277874500878 is an equidigital number, since it uses as much as digits as its factorization.

128277874500878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64138937250441.

The product of its (nonzero) digits is 786759680, while the sum is 74.

The spelling of 128277874500878 in words is "one hundred twenty-eight trillion, two hundred seventy-seven billion, eight hundred seventy-four million, five hundred thousand, eight hundred seventy-eight".