4640387784078 has 8 divisors (see below), whose sum is σ = 9280775568168. Its totient is φ = 1546795928024.

The previous prime is 4640387784077. The next prime is 4640387784119. The reversal of 4640387784078 is 8704877830464.

It is a sphenic number, since it is the product of 3 distinct primes.

4640387784078 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4640387784077) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 386698982001 + ... + 386698982012.

It is an arithmetic number, because the mean of its divisors is an integer number (1160096946021).

Almost surely, 2^{4640387784078} is an apocalyptic number.

4640387784078 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

4640387784078 is a wasteful number, since it uses less digits than its factorization.

4640387784078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 773397964018.

The product of its (nonzero) digits is 202309632, while the sum is 66.

The spelling of 4640387784078 in words is "four trillion, six hundred forty billion, three hundred eighty-seven million, seven hundred eighty-four thousand, seventy-eight".