440778345642 has 48 divisors (see below), whose sum is σ = 997543347840. Its totient is φ = 140482401696.

The previous prime is 440778345611. The next prime is 440778345649. The reversal of 440778345642 is 246543877044.

440778345642 is a `hidden beast` number, since 4 + 4 + 0 + 7 + 78 + 3 + 4 + 564 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (440778345649) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4045278 + ... + 4152809.

It is an arithmetic number, because the mean of its divisors is an integer number (20782153080).

Almost surely, 2^440778345642 is an apocalyptic number.

440778345642 is an abundant number, since it is smaller than the sum of its proper divisors (556765002198).

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

440778345642 is a wasteful number, since it uses less digits than its factorization.

440778345642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8198227 (or 8198224 counting only the distinct ones).

The product of its (nonzero) digits is 18063360, while the sum is 54.

The spelling of 440778345642 in words is "four hundred forty billion, seven hundred seventy-eight million, three hundred forty-five thousand, six hundred forty-two".