128947064464 has 45 divisors (see below), whose sum is σ = 252492609187. Its totient is φ = 63794848352.

The previous prime is 128947064459. The next prime is 128947064527. The reversal of 128947064464 is 464460749821.

The square root of 128947064464 is 359092.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 153690957 + ... + 153691795.

Almost surely, 2^128947064464 is an apocalyptic number.

128947064464 is the 359092-nd square number.

It is an amenable number.

128947064464 is a deficient number, since it is larger than the sum of its proper divisors (123545544723).

128947064464 is an frugal number, since it uses more digits than its factorization.

128947064464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1900 (or 948 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 55.

The spelling of 128947064464 in words is "one hundred twenty-eight billion, nine hundred forty-seven million, sixty-four thousand, four hundred sixty-four".