64147343904 has 384 divisors, whose sum is σ = 221947084800. Its totient is φ = 17635968000.

The previous prime is 64147343893. The next prime is 64147343957. The reversal of 64147343904 is 40934374146.

It is a super-2 number, since 2×64147343904² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64147343904.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 85415529 + ... + 85416279.

It is an arithmetic number, because the mean of its divisors is an integer number (577987200).

Almost surely, 2^64147343904 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 64147343904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110973542400).

64147343904 is an abundant number, since it is smaller than the sum of its proper divisors (157799740896).

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

64147343904 is a wasteful number, since it uses less digits than its factorization.

64147343904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1293 (or 1279 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 45.

The spelling of 64147343904 in words is "sixty-four billion, one hundred forty-seven million, three hundred forty-three thousand, nine hundred four".