64423455 has 16 divisors (see below), whose sum is σ = 109141344. Its totient is φ = 32337920.

The previous prime is 64423453. The next prime is 64423459. The reversal of 64423455 is 55432446.

It is not a de Polignac number, because 64423455 - 2¹ = 64423453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64423453) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 126066 + ... + 126575.

It is an arithmetic number, because the mean of its divisors is an integer number (6821334).

Almost surely, 2^64423455 is an apocalyptic number.

64423455 is a deficient number, since it is larger than the sum of its proper divisors (44717889).

64423455 is a wasteful number, since it uses less digits than its factorization.

64423455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252666.

The product of its digits is 57600, while the sum is 33.

The square root of 64423455 is about 8026.4223038662. The cubic root of 64423455 is about 400.8802593544.

The spelling of 64423455 in words is "sixty-four million, four hundred twenty-three thousand, four hundred fifty-five".