64442341445250 has 64 divisors (see below), whose sum is σ = 160849269060480. Its totient is φ = 17184497803200.

The previous prime is 64442341445221. The next prime is 64442341445323. The reversal of 64442341445250 is 5254414324446.

It is a self number, because there is not a number n which added to its sum of digits gives 64442341445250.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 147684396 + ... + 148120104.

It is an arithmetic number, because the mean of its divisors is an integer number (2513269829070).

Almost surely, 2^{64442341445250} is an apocalyptic number.

64442341445250 is an abundant number, since it is smaller than the sum of its proper divisors (96406927615230).

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

64442341445250 is a wasteful number, since it uses less digits than its factorization.

64442341445250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632932 (or 632922 counting only the distinct ones).

The product of its (nonzero) digits is 7372800, while the sum is 48.

Adding to 64442341445250 its reverse (5254414324446), we get a palindrome (69696755769696).

The spelling of 64442341445250 in words is "sixty-four trillion, four hundred forty-two billion, three hundred forty-one million, four hundred forty-five thousand, two hundred fifty".