64631196 has 216 divisors, whose sum is σ = 209139840. Its totient is φ = 17363808.

The previous prime is 64631167. The next prime is 64631233. The reversal of 64631196 is 69113646.

64631196 is a `hidden beast` number, since 6 + 4 + 631 + 19 + 6 = 666.

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

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 64631196.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1095415 + ... + 1095473.

It is an arithmetic number, because the mean of its divisors is an integer number (968240).

Almost surely, 2^64631196 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 64631196, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104569920).

64631196 is an abundant number, since it is smaller than the sum of its proper divisors (144508644).

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

64631196 is a wasteful number, since it uses less digits than its factorization.

64631196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115 (or 94 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 64631196 is about 8039.3529590384. The cubic root of 64631196 is about 401.3106921907.

The spelling of 64631196 in words is "sixty-four million, six hundred thirty-one thousand, one hundred ninety-six".