64240655 has 8 divisors (see below), whose sum is σ = 79747200. Its totient is φ = 49620256.

The previous prime is 64240651. The next prime is 64240699. The reversal of 64240655 is 55604246.

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

It is a cyclic number.

It is not a de Polignac number, because 64240655 - 2² = 64240651 is a prime.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64240651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221375 + ... + 221664.

It is an arithmetic number, because the mean of its divisors is an integer number (9968400).

Almost surely, 2^64240655 is an apocalyptic number.

64240655 is a deficient number, since it is larger than the sum of its proper divisors (15506545).

64240655 is a wasteful number, since it uses less digits than its factorization.

64240655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443073.

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 64240655 is about 8015.0268246588. The cubic root of 64240655 is about 400.5007374767.

The spelling of 64240655 in words is "sixty-four million, two hundred forty thousand, six hundred fifty-five".