64938645 has 64 divisors (see below), whose sum is σ = 121651200. Its totient is φ = 32823360.

The previous prime is 64938641. The next prime is 64938649. The reversal of 64938645 is 54683946.

It is an interprime number because it is at equal distance from previous prime (64938641) and next prime (64938649).

It is not a de Polignac number, because 64938645 - 2² = 64938641 is a prime.

It is a super-2 number, since 2×64938645² = 8434055228872050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 64938645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64938641) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 246784 + ... + 247046.

It is an arithmetic number, because the mean of its divisors is an integer number (1900800).

Almost surely, 2^64938645 is an apocalyptic number.

It is an amenable number.

64938645 is a deficient number, since it is larger than the sum of its proper divisors (56712555).

64938645 is a wasteful number, since it uses less digits than its factorization.

64938645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367 (or 361 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The square root of 64938645 is about 8058.4517743795. The cubic root of 64938645 is about 401.9460275056.

The spelling of 64938645 in words is "sixty-four million, nine hundred thirty-eight thousand, six hundred forty-five".