64109239560 has 128 divisors (see below), whose sum is σ = 214458969600. Its totient is φ = 17034877440.

The previous prime is 64109239511. The next prime is 64109239561. The reversal of 64109239560 is 6593290146.

64109239560 is a `hidden beast` number, since 6 + 410 + 92 + 3 + 95 + 60 = 666.

It is a super-2 number, since 2×64109239560² (a number of 22 digits) contains 22 as substring.

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 (64109239561) 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 31 ways as a sum of consecutive naturals, for example, 197857 + ... + 409103.

It is an arithmetic number, because the mean of its divisors is an integer number (1675460700).

Almost surely, 2^64109239560 is an apocalyptic number.

64109239560 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 64109239560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107229484800).

64109239560 is an abundant number, since it is smaller than the sum of its proper divisors (150349730040).

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

64109239560 is a wasteful number, since it uses less digits than its factorization.

64109239560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211548 (or 211538 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The spelling of 64109239560 in words is "sixty-four billion, one hundred nine million, two hundred thirty-nine thousand, five hundred sixty".