64133155 has 4 divisors (see below), whose sum is σ = 76959792. Its totient is φ = 51306520.

The previous prime is 64133149. The next prime is 64133159. The reversal of 64133155 is 55133146.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55133146 = 2 ⋅27566573.

It is not a de Polignac number, because 64133155 - 2¹⁷ = 64002083 is a prime.

It is a super-2 number, since 2×64133155² = 8226123140508050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64133159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6413311 + ... + 6413320.

It is an arithmetic number, because the mean of its divisors is an integer number (19239948).

Almost surely, 2^64133155 is an apocalyptic number.

64133155 is a deficient number, since it is larger than the sum of its proper divisors (12826637).

64133155 is a wasteful number, since it uses less digits than its factorization.

64133155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12826636.

The product of its digits is 5400, while the sum is 28.

The square root of 64133155 is about 8008.3178633219. The cubic root of 64133155 is about 400.2772140865.

Subtracting from 64133155 its reverse (55133146), we obtain a palindrome (9000009).

The spelling of 64133155 in words is "sixty-four million, one hundred thirty-three thousand, one hundred fifty-five".