64648787040 has 192 divisors, whose sum is σ = 226532920320. Its totient is φ = 17219704320.

The previous prime is 64648787017. The next prime is 64648787069. The reversal of 64648787040 is 4078784646.

64648787040 is a `hidden beast` number, since 6 + 46 + 487 + 87 + 0 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 3927307 + ... + 3943733.

It is an arithmetic number, because the mean of its divisors is an integer number (1179858960).

Almost surely, 2^64648787040 is an apocalyptic number.

64648787040 is a gapful number since it is divisible by the number (60) 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 64648787040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113266460160).

64648787040 is an abundant number, since it is smaller than the sum of its proper divisors (161884133280).

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

64648787040 is a wasteful number, since it uses less digits than its factorization.

64648787040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17362 (or 17348 counting only the distinct ones).

The product of its (nonzero) digits is 7225344, while the sum is 54.

The spelling of 64648787040 in words is "sixty-four billion, six hundred forty-eight million, seven hundred eighty-seven thousand, forty".