64620240042246 has 32 divisors (see below), whose sum is σ = 149726740144128. Its totient is φ = 18210008934720.

The previous prime is 64620240042227. The next prime is 64620240042247. The reversal of 64620240042246 is 64224004202646.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 64620240042198 and 64620240042207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64620240042247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10538196550 + ... + 10538202681.

It is an arithmetic number, because the mean of its divisors is an integer number (4678960629504).

Almost surely, 2^{64620240042246} is an apocalyptic number.

64620240042246 is an abundant number, since it is smaller than the sum of its proper divisors (85106500101882).

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

64620240042246 is a wasteful number, since it uses less digits than its factorization.

64620240042246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21076399316.

The product of its (nonzero) digits is 884736, while the sum is 42.

The spelling of 64620240042246 in words is "sixty-four trillion, six hundred twenty billion, two hundred forty million, forty-two thousand, two hundred forty-six".