11509029438 has 32 divisors (see below), whose sum is σ = 23298842112. Its totient is φ = 3789828000.

The previous prime is 11509029437. The next prime is 11509029439. The reversal of 11509029438 is 83492090511.

It is an interprime number because it is at equal distance from previous prime (11509029437) and next prime (11509029439).

It is a self number, because there is not a number n which added to its sum of digits gives 11509029438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11509029431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128895 + ... + 199077.

It is an arithmetic number, because the mean of its divisors is an integer number (728088816).

Almost surely, 2^11509029438 is an apocalyptic number.

11509029438 is an abundant number, since it is smaller than the sum of its proper divisors (11789812674).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11509029438 is a wasteful number, since it uses less digits than its factorization.

11509029438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70520.

The product of its (nonzero) digits is 77760, while the sum is 42.

The spelling of 11509029438 in words is "eleven billion, five hundred nine million, twenty-nine thousand, four hundred thirty-eight".