64792780416 has 256 divisors, whose sum is σ = 235359532800. Its totient is φ = 17088122880.

The previous prime is 64792780379. The next prime is 64792780417. The reversal of 64792780416 is 61408729746.

64792780416 is a `hidden beast` number, since 64 + 7 + 92 + 7 + 80 + 416 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (64792780417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 211486 + ... + 417506.

It is an arithmetic number, because the mean of its divisors is an integer number (919373175).

Almost surely, 2^64792780416 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 64792780416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117679766400).

64792780416 is an abundant number, since it is smaller than the sum of its proper divisors (170566752384).

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

64792780416 is a wasteful number, since it uses less digits than its factorization.

64792780416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206064 (or 206046 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 54.

The spelling of 64792780416 in words is "sixty-four billion, seven hundred ninety-two million, seven hundred eighty thousand, four hundred sixteen".