64739549 has 12 divisors (see below), whose sum is σ = 77349216. Its totient is φ = 53075352.

The previous prime is 64739531. The next prime is 64739557. The reversal of 64739549 is 94593746.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-64739549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64739509) 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, 5039 + ... + 12444.

It is an arithmetic number, because the mean of its divisors is an integer number (6445768).

Almost surely, 2^64739549 is an apocalyptic number.

It is an amenable number.

64739549 is a deficient number, since it is larger than the sum of its proper divisors (12609667).

64739549 is a wasteful number, since it uses less digits than its factorization.

64739549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17536 (or 17513 counting only the distinct ones).

The product of its digits is 816480, while the sum is 47.

The square root of 64739549 is about 8046.0890499671. The cubic root of 64739549 is about 401.5348302908.

The spelling of 64739549 in words is "sixty-four million, seven hundred thirty-nine thousand, five hundred forty-nine".