64788945 has 16 divisors (see below), whose sum is σ = 111636672. Its totient is φ = 31896000.

The previous prime is 64788931. The next prime is 64788959. The reversal of 64788945 is 54988746.

It is an interprime number because it is at equal distance from previous prime (64788931) and next prime (64788959).

It is not a de Polignac number, because 64788945 - 2⁶ = 64788881 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 165931 + ... + 166320.

It is an arithmetic number, because the mean of its divisors is an integer number (6977292).

Almost surely, 2^64788945 is an apocalyptic number.

64788945 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

64788945 is a deficient number, since it is larger than the sum of its proper divisors (46847727).

64788945 is a wasteful number, since it uses less digits than its factorization.

64788945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332272.

The product of its digits is 1935360, while the sum is 51.

The square root of 64788945 is about 8049.1580305023. The cubic root of 64788945 is about 401.6369274501.

The spelling of 64788945 in words is "sixty-four million, seven hundred eighty-eight thousand, nine hundred forty-five".