64738449388 has 24 divisors (see below), whose sum is σ = 113510244960. Its totient is φ = 32307014400.

The previous prime is 64738449383. The next prime is 64738449401. The reversal of 64738449388 is 88394483746.

It is not an unprimeable number, because it can be changed into a prime (64738449383) 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, 4715478 + ... + 4729186.

It is an arithmetic number, because the mean of its divisors is an integer number (4729593540).

Almost surely, 2^64738449388 is an apocalyptic number.

It is an amenable number.

64738449388 is a deficient number, since it is larger than the sum of its proper divisors (48771795572).

64738449388 is a wasteful number, since it uses less digits than its factorization.

64738449388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15897 (or 15895 counting only the distinct ones).

The product of its digits is 111476736, while the sum is 64.

The spelling of 64738449388 in words is "sixty-four billion, seven hundred thirty-eight million, four hundred forty-nine thousand, three hundred eighty-eight".