128452438401 has 16 divisors (see below), whose sum is σ = 196362417024. Its totient is φ = 73166880384.

The previous prime is 128452438381. The next prime is 128452438409. The reversal of 128452438401 is 104834254821.

It is not a de Polignac number, because 128452438401 - 2¹⁸ = 128452176257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128452438409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9764646 + ... + 9777791.

It is an arithmetic number, because the mean of its divisors is an integer number (12272651064).

Almost surely, 2^128452438401 is an apocalyptic number.

It is an amenable number.

128452438401 is a deficient number, since it is larger than the sum of its proper divisors (67909978623).

128452438401 is a wasteful number, since it uses less digits than its factorization.

128452438401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19542760.

The product of its (nonzero) digits is 245760, while the sum is 42.

The spelling of 128452438401 in words is "one hundred twenty-eight billion, four hundred fifty-two million, four hundred thirty-eight thousand, four hundred one".