64118911 has 4 divisors (see below), whose sum is σ = 64891512. Its totient is φ = 63346312.

The previous prime is 64118909. The next prime is 64118927. The reversal of 64118911 is 11981146.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64118911 - 2¹ = 64118909 is a prime.

It is a super-2 number, since 2×64118911² = 8222469495651842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64118981) 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, 386176 + ... + 386341.

It is an arithmetic number, because the mean of its divisors is an integer number (16222878).

Almost surely, 2^64118911 is an apocalyptic number.

64118911 is a deficient number, since it is larger than the sum of its proper divisors (772601).

64118911 is an equidigital number, since it uses as much as digits as its factorization.

64118911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772600.

The product of its digits is 1728, while the sum is 31.

The square root of 64118911 is about 8007.4284885973. The cubic root of 64118911 is about 400.2475779812.

The spelling of 64118911 in words is "sixty-four million, one hundred eighteen thousand, nine hundred eleven".