64711040 has 32 divisors (see below), whose sum is σ = 154701360. Its totient is φ = 25884160.

The previous prime is 64711037. The next prime is 64711067. The reversal of 64711040 is 4011746.

64711040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 64710997 and 64711015.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49916 + ... + 51195.

Almost surely, 2^64711040 is an apocalyptic number.

It is an amenable number.

64711040 is an abundant number, since it is smaller than the sum of its proper divisors (89990320).

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

64711040 is a wasteful number, since it uses less digits than its factorization.

64711040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101130 (or 101118 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 64711040 is about 8044.3172488409. The cubic root of 64711040 is about 401.4758810735.

Adding to 64711040 its reverse (4011746), we get a palindrome (68722786).

The spelling of 64711040 in words is "sixty-four million, seven hundred eleven thousand, forty".