64620024240 has 40 divisors (see below), whose sum is σ = 200322075888. Its totient is φ = 17232006400.

The previous prime is 64620024221. The next prime is 64620024253. The reversal of 64620024240 is 4242002646.

64620024240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-3 number, since 3×64620024240³ (a number of 33 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 64620024198 and 64620024207.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134624811 + ... + 134625290.

Almost surely, 2^64620024240 is an apocalyptic number.

64620024240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64620024240 is an abundant number, since it is smaller than the sum of its proper divisors (135702051648).

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

64620024240 is a wasteful number, since it uses less digits than its factorization.

64620024240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269250117 (or 269250111 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 30.

Adding to 64620024240 its reverse (4242002646), we get a palindrome (68862026886).

The spelling of 64620024240 in words is "sixty-four billion, six hundred twenty million, twenty-four thousand, two hundred forty".