1264583838064 has 80 divisors (see below), whose sum is σ = 2612116563840. Its totient is φ = 591008952320.

The previous prime is 1264583838061. The next prime is 1264583838079. The reversal of 1264583838064 is 4608383854621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264583838061) 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 15 ways as a sum of consecutive naturals, for example, 44265417 + ... + 44293975.

It is an arithmetic number, because the mean of its divisors is an integer number (32651457048).

Almost surely, 2^{1264583838064} 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 1264583838064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1306058281920).

1264583838064 is an abundant number, since it is smaller than the sum of its proper divisors (1347532725776).

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

1264583838064 is a wasteful number, since it uses less digits than its factorization.

1264583838064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29698 (or 29692 counting only the distinct ones).

The product of its (nonzero) digits is 26542080, while the sum is 58.

The spelling of 1264583838064 in words is "one trillion, two hundred sixty-four billion, five hundred eighty-three million, eight hundred thirty-eight thousand, sixty-four".