64603342056 has 128 divisors (see below), whose sum is σ = 182674022400. Its totient is φ = 18861984000.

The previous prime is 64603342051. The next prime is 64603342121. The reversal of 64603342056 is 65024330646.

It is not an unprimeable number, because it can be changed into a prime (64603342051) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1856901 + ... + 1891371.

It is an arithmetic number, because the mean of its divisors is an integer number (1427140800).

Almost surely, 2^64603342056 is an apocalyptic number.

64603342056 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64603342056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91337011200).

64603342056 is an abundant number, since it is smaller than the sum of its proper divisors (118070680344).

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

64603342056 is a wasteful number, since it uses less digits than its factorization.

64603342056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34751 (or 34747 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 39.

The spelling of 64603342056 in words is "sixty-four billion, six hundred three million, three hundred forty-two thousand, fifty-six".