64245791 has 4 divisors (see below), whose sum is σ = 64276584. Its totient is φ = 64215000.

The previous prime is 64245787. The next prime is 64245793. The reversal of 64245791 is 19754246.

64245791 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64245791 - 2² = 64245787 is a prime.

It is a super-2 number, since 2×64245791² = 8255043322431362, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64245793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12020 + ... + 16521.

It is an arithmetic number, because the mean of its divisors is an integer number (16069146).

Almost surely, 2^64245791 is an apocalyptic number.

64245791 is a deficient number, since it is larger than the sum of its proper divisors (30793).

64245791 is a wasteful number, since it uses less digits than its factorization.

64245791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30792.

The product of its digits is 60480, while the sum is 38.

The square root of 64245791 is about 8015.3472164342. The cubic root of 64245791 is about 400.5114104530.

The spelling of 64245791 in words is "sixty-four million, two hundred forty-five thousand, seven hundred ninety-one".