64049791 has 4 divisors (see below), whose sum is σ = 68976712. Its totient is φ = 59122872.

The previous prime is 64049771. The next prime is 64049801. The reversal of 64049791 is 19794046.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19794046 = 2 ⋅9897023.

It is a cyclic number.

It is not a de Polignac number, because 64049791 - 2⁵ = 64049759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64049731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2463441 + ... + 2463466.

It is an arithmetic number, because the mean of its divisors is an integer number (17244178).

Almost surely, 2^64049791 is an apocalyptic number.

64049791 is a deficient number, since it is larger than the sum of its proper divisors (4926921).

64049791 is a wasteful number, since it uses less digits than its factorization.

64049791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4926920.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 64049791 is about 8003.1113324756. Note that the first 3 decimals coincide. The cubic root of 64049791 is about 400.1037043612.

The spelling of 64049791 in words is "sixty-four million, forty-nine thousand, seven hundred ninety-one".