128239155451 has 6 divisors (see below), whose sum is σ = 140957088356. Its totient is φ = 116581050300.

The previous prime is 128239155437. The next prime is 128239155469. The reversal of 128239155451 is 154551932821.

It is not a de Polignac number, because 128239155451 - 2¹³ = 128239147259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128239155151) 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, 529913745 + ... + 529913986.

Almost surely, 2^128239155451 is an apocalyptic number.

128239155451 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

128239155451 is a deficient number, since it is larger than the sum of its proper divisors (12717932905).

128239155451 is a wasteful number, since it uses less digits than its factorization.

128239155451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1059827753 (or 1059827742 counting only the distinct ones).

The product of its digits is 432000, while the sum is 46.

The spelling of 128239155451 in words is "one hundred twenty-eight billion, two hundred thirty-nine million, one hundred fifty-five thousand, four hundred fifty-one".