128356780464 has 80 divisors (see below), whose sum is σ = 401925287040. Its totient is φ = 38895992640.

The previous prime is 128356780459. The next prime is 128356780469. The reversal of 128356780464 is 464087653821.

It is a happy number.

128356780464 is a `hidden beast` number, since 12 + 8 + 3 + 567 + 8 + 0 + 4 + 64 = 666.

It is an interprime number because it is at equal distance from previous prime (128356780459) and next prime (128356780469).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 128356780464.

It is not an unprimeable number, because it can be changed into a prime (128356780469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13500802 + ... + 13510305.

It is an arithmetic number, because the mean of its divisors is an integer number (5024066088).

Almost surely, 2^128356780464 is an apocalyptic number.

It is an amenable number.

128356780464 is an abundant number, since it is smaller than the sum of its proper divisors (273568506576).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128356780464 is a wasteful number, since it uses less digits than its factorization.

128356780464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27011135 (or 27011123 counting only the distinct ones).

The product of its (nonzero) digits is 7741440, while the sum is 54.

The spelling of 128356780464 in words is "one hundred twenty-eight billion, three hundred fifty-six million, seven hundred eighty thousand, four hundred sixty-four".