64155565260 has 288 divisors, whose sum is σ = 209125530432. Its totient is φ = 15863316480.

The previous prime is 64155565249. The next prime is 64155565261. The reversal of 64155565260 is 6256555146.

64155565260 is a `hidden beast` number, since 6 + 41 + 5 + 556 + 52 + 6 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (64155565261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 98247094 + ... + 98247746.

It is an arithmetic number, because the mean of its divisors is an integer number (726130314).

Almost surely, 2^64155565260 is an apocalyptic number.

64155565260 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64155565260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104562765216).

64155565260 is an abundant number, since it is smaller than the sum of its proper divisors (144969965172).

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

64155565260 is a wasteful number, since it uses less digits than its factorization.

64155565260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1113 (or 1108 counting only the distinct ones).

The product of its (nonzero) digits is 1080000, while the sum is 45.

The spelling of 64155565260 in words is "sixty-four billion, one hundred fifty-five million, five hundred sixty-five thousand, two hundred sixty".