64384165755 has 144 divisors (see below), whose sum is σ = 139051598400. Its totient is φ = 26983037952.

The previous prime is 64384165753. The next prime is 64384165799. The reversal of 64384165755 is 55756148346.

It is a happy number.

64384165755 is a `hidden beast` number, since 64 + 3 + 8 + 4 + 1 + 6 + 575 + 5 = 666.

It is not a de Polignac number, because 64384165755 - 2¹ = 64384165753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64384165753) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 7927957 + ... + 7936073.

It is an arithmetic number, because the mean of its divisors is an integer number (965636100).

Almost surely, 2^64384165755 is an apocalyptic number.

64384165755 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

64384165755 is an abundant number, since it is smaller than the sum of its proper divisors (74667432645).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64384165755 is a wasteful number, since it uses less digits than its factorization.

64384165755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8310 (or 8294 counting only the distinct ones).

The product of its digits is 12096000, while the sum is 54.

The spelling of 64384165755 in words is "sixty-four billion, three hundred eighty-four million, one hundred sixty-five thousand, seven hundred fifty-five".