11801056605 has 16 divisors (see below), whose sum is σ = 20334128640. Its totient is φ = 5809750848.

The previous prime is 11801056573. The next prime is 11801056607. The reversal of 11801056605 is 50665010811.

It is not a de Polignac number, because 11801056605 - 2⁵ = 11801056573 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11801056607) 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, 30258925 + ... + 30259314.

It is an arithmetic number, because the mean of its divisors is an integer number (1270883040).

Almost surely, 2^11801056605 is an apocalyptic number.

11801056605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11801056605 is a deficient number, since it is larger than the sum of its proper divisors (8533072035).

11801056605 is a wasteful number, since it uses less digits than its factorization.

11801056605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60518260.

The product of its (nonzero) digits is 7200, while the sum is 33.

It can be divided in two parts, 1180 and 1056605, that added together give a triangular number (1057785 = T₁₄₅₄).

The spelling of 11801056605 in words is "eleven billion, eight hundred one million, fifty-six thousand, six hundred five".