64246266664640 has 28 divisors (see below), whose sum is σ = 152986422495936. Its totient is φ = 25698506665728.

The previous prime is 64246266664579. The next prime is 64246266664651. The reversal of 64246266664640 is 4646666264246.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100384791344 + ... + 100384791983.

Almost surely, 2^{64246266664640} is an apocalyptic number.

It is an amenable number.

64246266664640 is an abundant number, since it is smaller than the sum of its proper divisors (88740155831296).

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

64246266664640 is a wasteful number, since it uses less digits than its factorization.

64246266664640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200769583344 (or 200769583334 counting only the distinct ones).

The product of its (nonzero) digits is 286654464, while the sum is 62.

The spelling of 64246266664640 in words is "sixty-four trillion, two hundred forty-six billion, two hundred sixty-six million, six hundred sixty-four thousand, six hundred forty".