11661154503 has 8 divisors (see below), whose sum is σ = 15558956928. Its totient is φ = 7768727544.

The previous prime is 11661154481. The next prime is 11661154507. The reversal of 11661154503 is 30545116611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11661154503 - 2²⁰ = 11660105927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11661154507) 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, 1338801 + ... + 1347482.

It is an arithmetic number, because the mean of its divisors is an integer number (1944869616).

Almost surely, 2^11661154503 is an apocalyptic number.

11661154503 is a deficient number, since it is larger than the sum of its proper divisors (3897802425).

11661154503 is a wasteful number, since it uses less digits than its factorization.

11661154503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2687733.

The product of its (nonzero) digits is 10800, while the sum is 33.

The spelling of 11661154503 in words is "eleven billion, six hundred sixty-one million, one hundred fifty-four thousand, five hundred three".