201899813639 has 4 divisors (see below), whose sum is σ = 212526119640. Its totient is φ = 191273507640.

The previous prime is 201899813627. The next prime is 201899813657. The reversal of 201899813639 is 936318998102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 936318998102 = 2 ⋅468159499051.

It is a cyclic number.

It is not a de Polignac number, because 201899813639 - 2⁴ = 201899813623 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 (201899813039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5313152972 + ... + 5313153009.

It is an arithmetic number, because the mean of its divisors is an integer number (53131529910).

Almost surely, 2^201899813639 is an apocalyptic number.

201899813639 is a deficient number, since it is larger than the sum of its proper divisors (10626306001).

201899813639 is a wasteful number, since it uses less digits than its factorization.

201899813639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10626306000.

The product of its (nonzero) digits is 5038848, while the sum is 59.

The spelling of 201899813639 in words is "two hundred one billion, eight hundred ninety-nine million, eight hundred thirteen thousand, six hundred thirty-nine".