128664854 has 4 divisors (see below), whose sum is σ = 192997284. Its totient is φ = 64332426.

The previous prime is 128664853. The next prime is 128664863. The reversal of 128664854 is 458466821.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 458466821 = 3559 ⋅128819.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128664853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32166212 + ... + 32166215.

It is an arithmetic number, because the mean of its divisors is an integer number (48249321).

Almost surely, 2^128664854 is an apocalyptic number.

128664854 is a deficient number, since it is larger than the sum of its proper divisors (64332430).

128664854 is an equidigital number, since it uses as much as digits as its factorization.

128664854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64332429.

The product of its digits is 368640, while the sum is 44.

The square root of 128664854 is about 11343.0531163351. The cubic root of 128664854 is about 504.8394797471.

The spelling of 128664854 in words is "one hundred twenty-eight million, six hundred sixty-four thousand, eight hundred fifty-four".