11261603544 has 32 divisors (see below), whose sum is σ = 29635800000. Its totient is φ = 3556295712.

The previous prime is 11261603543. The next prime is 11261603567. The reversal of 11261603544 is 44530616211.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11261603543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12347794 + ... + 12348705.

It is an arithmetic number, because the mean of its divisors is an integer number (926118750).

Almost surely, 2^11261603544 is an apocalyptic number.

It is an amenable number.

11261603544 is an abundant number, since it is smaller than the sum of its proper divisors (18374196456).

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

11261603544 is a wasteful number, since it uses less digits than its factorization.

11261603544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24696527 (or 24696523 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The spelling of 11261603544 in words is "eleven billion, two hundred sixty-one million, six hundred three thousand, five hundred forty-four".