64011996 has 18 divisors (see below), whose sum is σ = 161808192. Its totient is φ = 21337320.

The previous prime is 64011989. The next prime is 64012009. The reversal of 64011996 is 69911046.

64011996 is a `hidden beast` number, since 640 + 1 + 1 + 9 + 9 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1778111 = 64011996 / (6 + 4 + 0 + 1 + 1 + 9 + 9 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 64011996.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 889020 + ... + 889091.

It is an arithmetic number, because the mean of its divisors is an integer number (8989344).

Almost surely, 2^64011996 is an apocalyptic number.

It is an amenable number.

64011996 is an abundant number, since it is smaller than the sum of its proper divisors (97796196).

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

64011996 is a wasteful number, since it uses less digits than its factorization.

64011996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1778121 (or 1778116 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 64011996 is about 8000.7497148705. The cubic root of 64011996 is about 400.0249901054.

The spelling of 64011996 in words is "sixty-four million, eleven thousand, nine hundred ninety-six".