64469855 has 4 divisors (see below), whose sum is σ = 77363832. Its totient is φ = 51575880.

The previous prime is 64469833. The next prime is 64469891. The reversal of 64469855 is 55896446.

64469855 is nontrivially palindromic in base 4.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55896446 = 2 ⋅27948223.

It is not a de Polignac number, because 64469855 - 2⁶ = 64469791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6446981 + ... + 6446990.

It is an arithmetic number, because the mean of its divisors is an integer number (19340958).

Almost surely, 2^64469855 is an apocalyptic number.

64469855 is a deficient number, since it is larger than the sum of its proper divisors (12893977).

64469855 is a wasteful number, since it uses less digits than its factorization.

64469855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12893976.

The product of its digits is 1036800, while the sum is 47.

The square root of 64469855 is about 8029.3122370475. The cubic root of 64469855 is about 400.9764788661.

The spelling of 64469855 in words is "sixty-four million, four hundred sixty-nine thousand, eight hundred fifty-five".