9461521509 has 16 divisors (see below), whose sum is σ = 13776791040. Its totient is φ = 5728181360.

The previous prime is 9461521499. The next prime is 9461521529. The reversal of 9461521509 is 9051251649.

It is not a de Polignac number, because 9461521509 - 2¹² = 9461517413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9461521529) 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, 120129 + ... + 182630.

It is an arithmetic number, because the mean of its divisors is an integer number (861049440).

Almost surely, 2^9461521509 is an apocalyptic number.

It is an amenable number.

9461521509 is a deficient number, since it is larger than the sum of its proper divisors (4315269531).

9461521509 is a wasteful number, since it uses less digits than its factorization.

9461521509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303720.

The product of its (nonzero) digits is 97200, while the sum is 42.

The square root of 9461521509 is about 97270.3526723328. The cubic root of 9461521509 is about 2115.0484824771.

The spelling of 9461521509 in words is "nine billion, four hundred sixty-one million, five hundred twenty-one thousand, five hundred nine".