64613151240 has 128 divisors (see below), whose sum is σ = 212214971520. Its totient is φ = 15607961600.

The previous prime is 64613151151. The next prime is 64613151241. The reversal of 64613151240 is 4215131646.

It is a super-3 number, since 3×64613151240³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (64613151241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 283822 + ... + 458018.

It is an arithmetic number, because the mean of its divisors is an integer number (1657929465).

Almost surely, 2^64613151240 is an apocalyptic number.

64613151240 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 64613151240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106107485760).

64613151240 is an abundant number, since it is smaller than the sum of its proper divisors (147601820280).

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

64613151240 is a wasteful number, since it uses less digits than its factorization.

64613151240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174503 (or 174499 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

Adding to 64613151240 its reverse (4215131646), we get a palindrome (68828282886).

The spelling of 64613151240 in words is "sixty-four billion, six hundred thirteen million, one hundred fifty-one thousand, two hundred forty".