64455387 has 4 divisors (see below), whose sum is σ = 85940520. Its totient is φ = 42970256.

The previous prime is 64455383. The next prime is 64455397. The reversal of 64455387 is 78355446.

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 64455387 - 2² = 64455383 is a prime.

It is a super-3 number, since 3×64455387³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (64455383) 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, 10742562 + ... + 10742567.

It is an arithmetic number, because the mean of its divisors is an integer number (21485130).

Almost surely, 2^64455387 is an apocalyptic number.

64455387 is a deficient number, since it is larger than the sum of its proper divisors (21485133).

64455387 is a wasteful number, since it uses less digits than its factorization.

64455387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21485132.

The product of its digits is 403200, while the sum is 42.

The square root of 64455387 is about 8028.4112375986. The cubic root of 64455387 is about 400.9464815818.

The spelling of 64455387 in words is "sixty-four million, four hundred fifty-five thousand, three hundred eighty-seven".