64931703489 has 45 divisors (see below), whose sum is σ = 101479787409. Its totient is φ = 41372088120.

The previous prime is 64931703481. The next prime is 64931703491. The reversal of 64931703489 is 98430713946.

It is a happy number.

The square root of 64931703489 is 254817.

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

64931703489 is a `hidden beast` number, since 6 + 4 + 93 + 1 + 70 + 3 + 489 = 666.

It is not a de Polignac number, because 64931703489 - 2³ = 64931703481 is a prime.

It is a super-2 number, since 2×64931703489² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64931703481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 52746504 + ... + 52747734.

Almost surely, 2^64931703489 is an apocalyptic number.

64931703489 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

64931703489 is the 254817-th square number.

64931703489 is the 127409-th centered octagonal number.

It is an amenable number.

64931703489 is a deficient number, since it is larger than the sum of its proper divisors (36548083920).

64931703489 is an frugal number, since it uses more digits than its factorization.

64931703489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2520 (or 1257 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 54.

The spelling of 64931703489 in words is "sixty-four billion, nine hundred thirty-one million, seven hundred three thousand, four hundred eighty-nine".