64821954 has 8 divisors (see below), whose sum is σ = 129643920. Its totient is φ = 21607316.

The previous prime is 64821929. The next prime is 64821959. The reversal of 64821954 is 45912846.

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

64821954 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (64821959) 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, 5401824 + ... + 5401835.

It is an arithmetic number, because the mean of its divisors is an integer number (16205490).

Almost surely, 2^64821954 is an apocalyptic number.

64821954 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64821954 is a wasteful number, since it uses less digits than its factorization.

64821954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10803664.

The product of its digits is 69120, while the sum is 39.

The square root of 64821954 is about 8051.2082323090. The cubic root of 64821954 is about 401.7051252085.

The spelling of 64821954 in words is "sixty-four million, eight hundred twenty-one thousand, nine hundred fifty-four".