64949571 has 18 divisors (see below), whose sum is σ = 99663252. Its totient is φ = 40751040.

The previous prime is 64949519. The next prime is 64949579. The reversal of 64949571 is 17594946.

64949571 is a `hidden beast` number, since 6 + 494 + 95 + 71 = 666.

It is not a de Polignac number, because 64949571 - 2¹⁰ = 64948547 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (64949579) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 9885 + ... + 15086.

Almost surely, 2^64949571 is an apocalyptic number.

64949571 is a deficient number, since it is larger than the sum of its proper divisors (34713681).

64949571 is a wasteful number, since it uses less digits than its factorization.

64949571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25011 (or 24991 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 64949571 is about 8059.1296676502. The cubic root of 64949571 is about 401.9685688651.

The spelling of 64949571 in words is "sixty-four million, nine hundred forty-nine thousand, five hundred seventy-one".