64620844024 has 64 divisors (see below), whose sum is σ = 134874564480. Its totient is φ = 28775760000.

The previous prime is 64620844021. The next prime is 64620844051. The reversal of 64620844024 is 42044802646.

It is a happy number.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64620844021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3212799 + ... + 3232849.

It is an arithmetic number, because the mean of its divisors is an integer number (2107415070).

Almost surely, 2^64620844024 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64620844024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67437282240).

64620844024 is an abundant number, since it is smaller than the sum of its proper divisors (70253720456).

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

64620844024 is a wasteful number, since it uses less digits than its factorization.

64620844024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20812 (or 20808 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 40.

The spelling of 64620844024 in words is "sixty-four billion, six hundred twenty million, eight hundred forty-four thousand, twenty-four".