64681748 has 24 divisors (see below), whose sum is σ = 117250560. Its totient is φ = 31188960.

The previous prime is 64681741. The next prime is 64681789. The reversal of 64681748 is 84718646.

It is a junction number, because it is equal to n+sod(n) for n = 64681699 and 64681708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64681741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43790 + ... + 45242.

It is an arithmetic number, because the mean of its divisors is an integer number (4885440).

Almost surely, 2^64681748 is an apocalyptic number.

It is an amenable number.

64681748 is a deficient number, since it is larger than the sum of its proper divisors (52568812).

64681748 is a wasteful number, since it uses less digits than its factorization.

64681748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1847 (or 1845 counting only the distinct ones).

The product of its digits is 258048, while the sum is 44.

The square root of 64681748 is about 8042.4963786128. The cubic root of 64681748 is about 401.4152947790.

The spelling of 64681748 in words is "sixty-four million, six hundred eighty-one thousand, seven hundred forty-eight".