64249605 has 80 divisors (see below), whose sum is σ = 133398144. Its totient is φ = 28978560.

The previous prime is 64249597. The next prime is 64249609. The reversal of 64249605 is 50694246.

64249605 is a `hidden beast` number, since 6 + 4 + 2 + 49 + 605 = 666.

It is not a de Polignac number, because 64249605 - 2³ = 64249597 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64249605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64249609) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 371299 + ... + 371471.

Almost surely, 2^64249605 is an apocalyptic number.

It is an amenable number.

64249605 is an abundant number, since it is smaller than the sum of its proper divisors (69148539).

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

64249605 is a wasteful number, since it uses less digits than its factorization.

64249605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328 (or 319 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 64249605 is about 8015.5851314798. The cubic root of 64249605 is about 400.5193358505.

The spelling of 64249605 in words is "sixty-four million, two hundred forty-nine thousand, six hundred five".