64216554 has 16 divisors (see below), whose sum is σ = 128550240. Its totient is φ = 21386000.

The previous prime is 64216553. The next prime is 64216573. The reversal of 64216554 is 45561246.

It is not an unprimeable number, because it can be changed into a prime (64216553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3304 + ... + 11804.

It is an arithmetic number, because the mean of its divisors is an integer number (8034390).

Almost surely, 2^64216554 is an apocalyptic number.

64216554 is an abundant number, since it is smaller than the sum of its proper divisors (64333686).

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

64216554 is a wasteful number, since it uses less digits than its factorization.

64216554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9765.

The product of its digits is 28800, while the sum is 33.

The square root of 64216554 is about 8013.5231951995. The cubic root of 64216554 is about 400.4506462709.

The spelling of 64216554 in words is "sixty-four million, two hundred sixteen thousand, five hundred fifty-four".