64905534 has 24 divisors (see below), whose sum is σ = 140790000. Its totient is φ = 21610368.

The previous prime is 64905523. The next prime is 64905551. The reversal of 64905534 is 43550946.

It is a happy number.

64905534 is a `hidden beast` number, since 649 + 0 + 5 + 5 + 3 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21039 + ... + 23925.

It is an arithmetic number, because the mean of its divisors is an integer number (5866250).

Almost surely, 2^64905534 is an apocalyptic number.

64905534 is an abundant number, since it is smaller than the sum of its proper divisors (75884466).

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

64905534 is a wasteful number, since it uses less digits than its factorization.

64905534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4144 (or 4141 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 64905534 is about 8056.3970855464. The cubic root of 64905534 is about 401.8777009720.

The spelling of 64905534 in words is "sixty-four million, nine hundred five thousand, five hundred thirty-four".