64828155 has 16 divisors (see below), whose sum is σ = 118543104. Its totient is φ = 29635680.

The previous prime is 64828151. The next prime is 64828189. The reversal of 64828155 is 55182846.

It is not a de Polignac number, because 64828155 - 2² = 64828151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64828151) 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, 308601 + ... + 308810.

It is an arithmetic number, because the mean of its divisors is an integer number (7408944).

Almost surely, 2^64828155 is an apocalyptic number.

64828155 is a deficient number, since it is larger than the sum of its proper divisors (53714949).

64828155 is a wasteful number, since it uses less digits than its factorization.

64828155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617426.

The product of its digits is 76800, while the sum is 39.

The square root of 64828155 is about 8051.5933205795. The cubic root of 64828155 is about 401.7179341099.

The spelling of 64828155 in words is "sixty-four million, eight hundred twenty-eight thousand, one hundred fifty-five".