200991391539 has 4 divisors (see below), whose sum is σ = 267988522056. Its totient is φ = 133994261024.

The previous prime is 200991391487. The next prime is 200991391543. The reversal of 200991391539 is 935193199002.

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 200991391539 - 2²⁹ = 200454520627 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 200991391491 and 200991391500.

It is not an unprimeable number, because it can be changed into a prime (200991390539) 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, 33498565254 + ... + 33498565259.

It is an arithmetic number, because the mean of its divisors is an integer number (66997130514).

Almost surely, 2^200991391539 is an apocalyptic number.

200991391539 is a deficient number, since it is larger than the sum of its proper divisors (66997130517).

200991391539 is an equidigital number, since it uses as much as digits as its factorization.

200991391539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66997130516.

The product of its (nonzero) digits is 590490, while the sum is 51.

The spelling of 200991391539 in words is "two hundred billion, nine hundred ninety-one million, three hundred ninety-one thousand, five hundred thirty-nine".