64645455 has 48 divisors (see below), whose sum is σ = 121133664. Its totient is φ = 29352960.

The previous prime is 64645307. The next prime is 64645457. The reversal of 64645455 is 55454646.

It is not a de Polignac number, because 64645455 - 2¹⁶ = 64579919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64645457) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 206379 + ... + 206691.

It is an arithmetic number, because the mean of its divisors is an integer number (2523618).

Almost surely, 2^64645455 is an apocalyptic number.

64645455 is a deficient number, since it is larger than the sum of its proper divisors (56488209).

64645455 is a wasteful number, since it uses less digits than its factorization.

64645455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616 (or 609 counting only the distinct ones).

The product of its digits is 288000, while the sum is 39.

The square root of 64645455 is about 8040.2397352318. The cubic root of 64645455 is about 401.3402025445.

The spelling of 64645455 in words is "sixty-four million, six hundred forty-five thousand, four hundred fifty-five".