128762864899 has 4 divisors (see below), whose sum is σ = 128772238464. Its totient is φ = 128753491336.

The previous prime is 128762864897. The next prime is 128762864903. The reversal of 128762864899 is 998468267821.

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

It is a cyclic number.

It is not a de Polignac number, because 128762864899 - 2¹ = 128762864897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128762864897) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4666147 + ... + 4693660.

It is an arithmetic number, because the mean of its divisors is an integer number (32193059616).

Almost surely, 2^128762864899 is an apocalyptic number.

128762864899 is a deficient number, since it is larger than the sum of its proper divisors (9373565).

128762864899 is an equidigital number, since it uses as much as digits as its factorization.

128762864899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9373564.

The product of its digits is 167215104, while the sum is 70.

The spelling of 128762864899 in words is "one hundred twenty-eight billion, seven hundred sixty-two million, eight hundred sixty-four thousand, eight hundred ninety-nine".