64645798 has 24 divisors (see below), whose sum is σ = 119438712. Its totient is φ = 26074944.

The previous prime is 64645793. The next prime is 64645837. The reversal of 64645798 is 89754646.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64645793) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17736 + ... + 21067.

It is an arithmetic number, because the mean of its divisors is an integer number (4976613).

Almost surely, 2^64645798 is an apocalyptic number.

64645798 is a deficient number, since it is larger than the sum of its proper divisors (54792914).

64645798 is a wasteful number, since it uses less digits than its factorization.

64645798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38836 (or 38829 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 49.

The square root of 64645798 is about 8040.2610654132. The cubic root of 64645798 is about 401.3409123621.

The spelling of 64645798 in words is "sixty-four million, six hundred forty-five thousand, seven hundred ninety-eight".