128154237755 has 4 divisors (see below), whose sum is σ = 153785085312. Its totient is φ = 102523390200.

The previous prime is 128154237751. The next prime is 128154237767. The reversal of 128154237755 is 557732451821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 557732451821 = 2689 ⋅207412589.

It is not a de Polignac number, because 128154237755 - 2² = 128154237751 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128154237751) 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, 12815423771 + ... + 12815423780.

It is an arithmetic number, because the mean of its divisors is an integer number (38446271328).

Almost surely, 2^128154237755 is an apocalyptic number.

128154237755 is a deficient number, since it is larger than the sum of its proper divisors (25630847557).

128154237755 is an equidigital number, since it uses as much as digits as its factorization.

128154237755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25630847556.

The product of its digits is 2352000, while the sum is 50.

The spelling of 128154237755 in words is "one hundred twenty-eight billion, one hundred fifty-four million, two hundred thirty-seven thousand, seven hundred fifty-five".