28701636541 has 8 divisors (see below), whose sum is σ = 28737418680. Its totient is φ = 28665879552.

The previous prime is 28701636539. The next prime is 28701636563. The reversal of 28701636541 is 14563610782.

It can be written as a sum of positive squares in 4 ways, for example, as 80102500 + 28621534041 = 8950^2 + 169179^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28701636541 - 2¹ = 28701636539 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 (28701636521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3209965 + ... + 3218893.

It is an arithmetic number, because the mean of its divisors is an integer number (3592177335).

Almost surely, 2^28701636541 is an apocalyptic number.

It is an amenable number.

28701636541 is a deficient number, since it is larger than the sum of its proper divisors (35782139).

28701636541 is a wasteful number, since it uses less digits than its factorization.

28701636541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12575.

The product of its (nonzero) digits is 241920, while the sum is 43.

The spelling of 28701636541 in words is "twenty-eight billion, seven hundred one million, six hundred thirty-six thousand, five hundred forty-one".