11261017509 has 16 divisors (see below), whose sum is σ = 17161538688. Its totient is φ = 6434157312.

The previous prime is 11261017507. The next prime is 11261017529. The reversal of 11261017509 is 90571016211.

It is not a de Polignac number, because 11261017509 - 2¹ = 11261017507 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11261017509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11261017507) 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, 210729 + ... + 258705.

It is an arithmetic number, because the mean of its divisors is an integer number (1072596168).

Almost surely, 2^11261017509 is an apocalyptic number.

It is an amenable number.

11261017509 is a deficient number, since it is larger than the sum of its proper divisors (5900521179).

11261017509 is a wasteful number, since it uses less digits than its factorization.

11261017509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59164.

The product of its (nonzero) digits is 3780, while the sum is 33.

The spelling of 11261017509 in words is "eleven billion, two hundred sixty-one million, seventeen thousand, five hundred nine".