201648863639 has 4 divisors (see below), whose sum is σ = 208602272760. Its totient is φ = 194695454520.

The previous prime is 201648863627. The next prime is 201648863657. The reversal of 201648863639 is 936368846102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 201648863639 - 2¹² = 201648859543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201648863699) 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, 3476704517 + ... + 3476704574.

It is an arithmetic number, because the mean of its divisors is an integer number (52150568190).

Almost surely, 2^201648863639 is an apocalyptic number.

201648863639 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

201648863639 is a deficient number, since it is larger than the sum of its proper divisors (6953409121).

201648863639 is an equidigital number, since it uses as much as digits as its factorization.

201648863639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6953409120.

The product of its (nonzero) digits is 8957952, while the sum is 56.

The spelling of 201648863639 in words is "two hundred one billion, six hundred forty-eight million, eight hundred sixty-three thousand, six hundred thirty-nine".