8535189621 has 16 divisors (see below), whose sum is σ = 13007844864. Its totient is φ = 4876560624.

The previous prime is 8535189587. The next prime is 8535189631. The reversal of 8535189621 is 1269815358.

It is a happy number.

It is not a de Polignac number, because 8535189621 - 2⁹ = 8535189109 is a prime.

It is a super-2 number, since 2×8535189621² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8535189631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148450 + ... + 197756.

It is an arithmetic number, because the mean of its divisors is an integer number (812990304).

Almost surely, 2^8535189621 is an apocalyptic number.

It is an amenable number.

8535189621 is a deficient number, since it is larger than the sum of its proper divisors (4472655243).

8535189621 is a wasteful number, since it uses less digits than its factorization.

8535189621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57560.

The product of its digits is 518400, while the sum is 48.

The square root of 8535189621 is about 92386.0899757101. The cubic root of 8535189621 is about 2043.6399850926.

The spelling of 8535189621 in words is "eight billion, five hundred thirty-five million, one hundred eighty-nine thousand, six hundred twenty-one".