201528779543 has 16 divisors (see below), whose sum is σ = 248950711296. Its totient is φ = 158862941280.

The previous prime is 201528779537. The next prime is 201528779591. The reversal of 201528779543 is 345977825102.

201528779543 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201528779543 is a prime.

It is a super-2 number, since 2×201528779543² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201528779503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4061321 + ... + 4110642.

It is an arithmetic number, because the mean of its divisors is an integer number (15559419456).

Almost surely, 2^201528779543 is an apocalyptic number.

201528779543 is a deficient number, since it is larger than the sum of its proper divisors (47421931753).

201528779543 is a wasteful number, since it uses less digits than its factorization.

201528779543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8172254.

The product of its (nonzero) digits is 4233600, while the sum is 53.

The spelling of 201528779543 in words is "two hundred one billion, five hundred twenty-eight million, seven hundred seventy-nine thousand, five hundred forty-three".