64403655 has 8 divisors (see below), whose sum is σ = 103045872. Its totient is φ = 34348608.

The previous prime is 64403653. The next prime is 64403671. The reversal of 64403655 is 55630446.

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

It is not a de Polignac number, because 64403655 - 2¹ = 64403653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64403653) 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, 2146774 + ... + 2146803.

It is an arithmetic number, because the mean of its divisors is an integer number (12880734).

Almost surely, 2^64403655 is an apocalyptic number.

64403655 is a deficient number, since it is larger than the sum of its proper divisors (38642217).

64403655 is a wasteful number, since it uses less digits than its factorization.

64403655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4293585.

The product of its (nonzero) digits is 43200, while the sum is 33.

The square root of 64403655 is about 8025.1887828262. The cubic root of 64403655 is about 400.8391861022.

The spelling of 64403655 in words is "sixty-four million, four hundred three thousand, six hundred fifty-five".