64534405 has 16 divisors (see below), whose sum is σ = 86091264. Its totient is φ = 46117440.

The previous prime is 64534403. The next prime is 64534417. The reversal of 64534405 is 50443546.

It is not a de Polignac number, because 64534405 - 2¹ = 64534403 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64534403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13999 + ... + 18028.

It is an arithmetic number, because the mean of its divisors is an integer number (5380704).

Almost surely, 2^64534405 is an apocalyptic number.

64534405 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

64534405 is a deficient number, since it is larger than the sum of its proper divisors (21556859).

64534405 is a wasteful number, since it uses less digits than its factorization.

64534405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32076.

The product of its (nonzero) digits is 28800, while the sum is 31.

The square root of 64534405 is about 8033.3308782845. The cubic root of 64534405 is about 401.1102592100.

The spelling of 64534405 in words is "sixty-four million, five hundred thirty-four thousand, four hundred five".