64578441 has 4 divisors (see below), whose sum is σ = 86104592. Its totient is φ = 43052292.

The previous prime is 64578439. The next prime is 64578463. The reversal of 64578441 is 14487546.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 64578441 - 2¹ = 64578439 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64578441.

It is not an unprimeable number, because it can be changed into a prime (64578841) 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, 10763071 + ... + 10763076.

It is an arithmetic number, because the mean of its divisors is an integer number (21526148).

Almost surely, 2^64578441 is an apocalyptic number.

It is an amenable number.

64578441 is a deficient number, since it is larger than the sum of its proper divisors (21526151).

64578441 is a wasteful number, since it uses less digits than its factorization.

64578441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21526150.

The product of its digits is 107520, while the sum is 39.

The square root of 64578441 is about 8036.0712415956. The cubic root of 64578441 is about 401.2014729602.

The spelling of 64578441 in words is "sixty-four million, five hundred seventy-eight thousand, four hundred forty-one".