128164557 has 16 divisors (see below), whose sum is σ = 180800000. Its totient is φ = 80532144.

The previous prime is 128164541. The next prime is 128164573. The reversal of 128164557 is 755461821.

It is an interprime number because it is at equal distance from previous prime (128164541) and next prime (128164573).

It is not a de Polignac number, because 128164557 - 2⁴ = 128164541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128164357) 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, 5694 + ... + 16992.

It is an arithmetic number, because the mean of its divisors is an integer number (11300000).

Almost surely, 2^128164557 is an apocalyptic number.

It is an amenable number.

128164557 is a deficient number, since it is larger than the sum of its proper divisors (52635443).

128164557 is a wasteful number, since it uses less digits than its factorization.

128164557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11520.

The product of its digits is 67200, while the sum is 39.

The square root of 128164557 is about 11320.9786237763. The cubic root of 128164557 is about 504.1842950040.

The spelling of 128164557 in words is "one hundred twenty-eight million, one hundred sixty-four thousand, five hundred fifty-seven".