10905491521 has 4 divisors (see below), whose sum is σ = 10905924352. Its totient is φ = 10905058692.

The previous prime is 10905491497. The next prime is 10905491539. The reversal of 10905491521 is 12519450901.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10905491521 - 2¹⁹ = 10904967233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10905491591) 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, 176121 + ... + 229846.

It is an arithmetic number, because the mean of its divisors is an integer number (2726481088).

Almost surely, 2^10905491521 is an apocalyptic number.

It is an amenable number.

10905491521 is a deficient number, since it is larger than the sum of its proper divisors (432831).

10905491521 is an equidigital number, since it uses as much as digits as its factorization.

10905491521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432830.

The product of its (nonzero) digits is 16200, while the sum is 37.

The spelling of 10905491521 in words is "ten billion, nine hundred five million, four hundred ninety-one thousand, five hundred twenty-one".