264128915 has 16 divisors (see below), whose sum is σ = 336024288. Its totient is φ = 198621696.

The previous prime is 264128911. The next prime is 264128927. The reversal of 264128915 is 519821462.

It is a cyclic number.

It is not a de Polignac number, because 264128915 - 2² = 264128911 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (264128911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91484 + ... + 94326.

It is an arithmetic number, because the mean of its divisors is an integer number (21001518).

Almost surely, 2^264128915 is an apocalyptic number.

264128915 is a deficient number, since it is larger than the sum of its proper divisors (71895373).

264128915 is a wasteful number, since it uses less digits than its factorization.

264128915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3958.

The product of its digits is 34560, while the sum is 38.

The square root of 264128915 is about 16252.0434099839. The cubic root of 264128915 is about 641.6112680195.

The spelling of 264128915 in words is "two hundred sixty-four million, one hundred twenty-eight thousand, nine hundred fifteen".