11561732903 has 16 divisors (see below), whose sum is σ = 13414256640. Its totient is φ = 9760452000.

The previous prime is 11561732881. The next prime is 11561732911. The reversal of 11561732903 is 30923716511.

It is a cyclic number.

It is not a de Polignac number, because 11561732903 - 2⁶ = 11561732839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11561732983) 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, 92228 + ... + 177846.

It is an arithmetic number, because the mean of its divisors is an integer number (838391040).

Almost surely, 2^11561732903 is an apocalyptic number.

11561732903 is a deficient number, since it is larger than the sum of its proper divisors (1852523737).

11561732903 is a wasteful number, since it uses less digits than its factorization.

11561732903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85918.

The product of its (nonzero) digits is 34020, while the sum is 38.

The spelling of 11561732903 in words is "eleven billion, five hundred sixty-one million, seven hundred thirty-two thousand, nine hundred three".