53515591009 has 4 divisors (see below), whose sum is σ = 53856454804. Its totient is φ = 53174727216.

The previous prime is 53515590991. The next prime is 53515591033. The reversal of 53515591009 is 90019551535.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19559421025 + 33956169984 = 139855^2 + 184272^2 .

It is a cyclic number.

It is not a de Polignac number, because 53515591009 - 2²⁷ = 53381373281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53515591039) 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 3 ways as a sum of consecutive naturals, for example, 170431662 + ... + 170431975.

It is an arithmetic number, because the mean of its divisors is an integer number (13464113701).

Almost surely, 2^53515591009 is an apocalyptic number.

It is an amenable number.

53515591009 is a deficient number, since it is larger than the sum of its proper divisors (340863795).

53515591009 is a wasteful number, since it uses less digits than its factorization.

53515591009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340863794.

The product of its (nonzero) digits is 151875, while the sum is 43.

The spelling of 53515591009 in words is "fifty-three billion, five hundred fifteen million, five hundred ninety-one thousand, nine".