11500490905 has 32 divisors (see below), whose sum is σ = 15473928960. Its totient is φ = 8154132480.

The previous prime is 11500490801. The next prime is 11500490909. The reversal of 11500490905 is 50909400511.

It is a happy number.

It is not a de Polignac number, because 11500490905 - 2¹⁷ = 11500359833 is a prime.

It is a super-2 number, since 2×11500490905² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11500490909) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 248385 + ... + 291025.

It is an arithmetic number, because the mean of its divisors is an integer number (483560280).

Almost surely, 2^11500490905 is an apocalyptic number.

It is an amenable number.

11500490905 is a deficient number, since it is larger than the sum of its proper divisors (3973438055).

11500490905 is a wasteful number, since it uses less digits than its factorization.

11500490905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42849.

The product of its (nonzero) digits is 8100, while the sum is 34.

The spelling of 11500490905 in words is "eleven billion, five hundred million, four hundred ninety thousand, nine hundred five".