64253661 has 8 divisors (see below), whose sum is σ = 86150880. Its totient is φ = 42596112.

The previous prime is 64253641. The next prime is 64253689. The reversal of 64253661 is 16635246.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64253661 - 2⁶ = 64253597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64253621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59290 + ... + 60363.

It is an arithmetic number, because the mean of its divisors is an integer number (10768860).

Almost surely, 2^64253661 is an apocalyptic number.

It is an amenable number.

64253661 is a deficient number, since it is larger than the sum of its proper divisors (21897219).

64253661 is a wasteful number, since it uses less digits than its factorization.

64253661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119835.

The product of its digits is 25920, while the sum is 33.

The square root of 64253661 is about 8015.8381345933. The cubic root of 64253661 is about 400.5277637739.

The spelling of 64253661 in words is "sixty-four million, two hundred fifty-three thousand, six hundred sixty-one".