128278850787 has 6 divisors (see below), whose sum is σ = 185291673372. Its totient is φ = 85519233852.

The previous prime is 128278850743. The next prime is 128278850831. The reversal of 128278850787 is 787058872821.

128278850787 is a `hidden beast` number, since 1 + 28 + 27 + 8 + 8 + 507 + 87 = 666.

It is an interprime number because it is at equal distance from previous prime (128278850743) and next prime (128278850831).

It is not a de Polignac number, because 128278850787 - 2⁶ = 128278850723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128278850717) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7126602813 + ... + 7126602830.

It is an arithmetic number, because the mean of its divisors is an integer number (30881945562).

Almost surely, 2^128278850787 is an apocalyptic number.

128278850787 is a deficient number, since it is larger than the sum of its proper divisors (57012822585).

128278850787 is a wasteful number, since it uses less digits than its factorization.

128278850787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14253205649 (or 14253205646 counting only the distinct ones).

The product of its (nonzero) digits is 28098560, while the sum is 63.

The spelling of 128278850787 in words is "one hundred twenty-eight billion, two hundred seventy-eight million, eight hundred fifty thousand, seven hundred eighty-seven".