64471356 has 48 divisors (see below), whose sum is σ = 167909280. Its totient is φ = 21392640.

The previous prime is 64471339. The next prime is 64471367. The reversal of 64471356 is 65317446.

It is a happy number.

64471356 is a `hidden beast` number, since 644 + 7 + 1 + 3 + 5 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 64471356.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24790 + ... + 27266.

It is an arithmetic number, because the mean of its divisors is an integer number (3498110).

Almost surely, 2^64471356 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64471356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83954640).

64471356 is an abundant number, since it is smaller than the sum of its proper divisors (103437924).

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

64471356 is a wasteful number, since it uses less digits than its factorization.

64471356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2731 (or 2723 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 64471356 is about 8029.4057065265. The cubic root of 64471356 is about 400.9795907134.

The spelling of 64471356 in words is "sixty-four million, four hundred seventy-one thousand, three hundred fifty-six".