128154237754 has 4 divisors (see below), whose sum is σ = 192231356634. Its totient is φ = 64077118876.

The previous prime is 128154237751. The next prime is 128154237767. The reversal of 128154237754 is 457732451821.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 95093907129 + 33060330625 = 308373^2 + 181825^2 .

It is a junction number, because it is equal to n+sod(n) for n = 128154237698 and 128154237707.

It is not an unprimeable number, because it can be changed into a prime (128154237751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32038559437 + ... + 32038559440.

Almost surely, 2^128154237754 is an apocalyptic number.

128154237754 is a deficient number, since it is larger than the sum of its proper divisors (64077118880).

128154237754 is an equidigital number, since it uses as much as digits as its factorization.

128154237754 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64077118879.

The product of its digits is 1881600, while the sum is 49.

The spelling of 128154237754 in words is "one hundred twenty-eight billion, one hundred fifty-four million, two hundred thirty-seven thousand, seven hundred fifty-four".