64403024740 has 48 divisors (see below), whose sum is σ = 143459536752. Its totient is φ = 24202244096.

The previous prime is 64403024729. The next prime is 64403024747. The reversal of 64403024740 is 4742030446.

It can be written as a sum of positive squares in 8 ways, for example, as 86007076 + 64317017664 = 9274^2 + 253608^2 .

It is a super-2 number, since 2×64403024740² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 64403024696 and 64403024705.

It is not an unprimeable number, because it can be changed into a prime (64403024747) 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, 19344 + ... + 359416.

It is an arithmetic number, because the mean of its divisors is an integer number (2988740349).

Almost surely, 2^64403024740 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 64403024740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71729768376).

64403024740 is an abundant number, since it is smaller than the sum of its proper divisors (79056512012).

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

64403024740 is a wasteful number, since it uses less digits than its factorization.

64403024740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340656 (or 340654 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 34.

The spelling of 64403024740 in words is "sixty-four billion, four hundred three million, twenty-four thousand, seven hundred forty".