128268292947 has 8 divisors (see below), whose sum is σ = 171039744960. Its totient is φ = 85504518120.

The previous prime is 128268292921. The next prime is 128268292949. The reversal of 128268292947 is 749292862821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 128268292947 - 2¹⁰ = 128268291923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128268292949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1880197 + ... + 1947222.

It is an arithmetic number, because the mean of its divisors is an integer number (21379968120).

Almost surely, 2^128268292947 is an apocalyptic number.

128268292947 is a deficient number, since it is larger than the sum of its proper divisors (42771452013).

128268292947 is a wasteful number, since it uses less digits than its factorization.

128268292947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3838593.

The product of its digits is 13934592, while the sum is 60.

The spelling of 128268292947 in words is "one hundred twenty-eight billion, two hundred sixty-eight million, two hundred ninety-two thousand, nine hundred forty-seven".