64104165540 has 36 divisors (see below), whose sum is σ = 194449302684. Its totient is φ = 17094444096.

The previous prime is 64104165511. The next prime is 64104165581. The reversal of 64104165540 is 4556140146.

64104165540 is a `hidden beast` number, since 6 + 4 + 10 + 41 + 65 + 540 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 16591500864 + 47512664676 = 128808^2 + 217974^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 64104165495 and 64104165504.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 178066947 + ... + 178067306.

It is an arithmetic number, because the mean of its divisors is an integer number (5401369519).

Almost surely, 2^64104165540 is an apocalyptic number.

64104165540 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64104165540 is an abundant number, since it is smaller than the sum of its proper divisors (130345137144).

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

64104165540 is a wasteful number, since it uses less digits than its factorization.

64104165540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356134268 (or 356134263 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The spelling of 64104165540 in words is "sixty-four billion, one hundred four million, one hundred sixty-five thousand, five hundred forty".