64838155 has 8 divisors (see below), whose sum is σ = 77994000. Its totient is φ = 51745056.

The previous prime is 64838149. The next prime is 64838167. The reversal of 64838155 is 55183846.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64838155 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13380 + ... + 17569.

It is an arithmetic number, because the mean of its divisors is an integer number (9749250).

Almost surely, 2^64838155 is an apocalyptic number.

64838155 is a deficient number, since it is larger than the sum of its proper divisors (13155845).

64838155 is a wasteful number, since it uses less digits than its factorization.

64838155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31373.

The product of its digits is 115200, while the sum is 40.

The square root of 64838155 is about 8052.2142917337. The cubic root of 64838155 is about 401.7385885760.

The spelling of 64838155 in words is "sixty-four million, eight hundred thirty-eight thousand, one hundred fifty-five".