11911955 has 16 divisors (see below), whose sum is σ = 16416000. Its totient is φ = 8206560.

The previous prime is 11911931. The next prime is 11911969. The reversal of 11911955 is 55911911.

11911955 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11911955 - 2²⁰ = 10863379 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4655 + ... + 6744.

It is an arithmetic number, because the mean of its divisors is an integer number (1026000).

Almost surely, 2^11911955 is an apocalyptic number.

11911955 is a deficient number, since it is larger than the sum of its proper divisors (4504045).

11911955 is a wasteful number, since it uses less digits than its factorization.

11911955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11434.

The product of its digits is 2025, while the sum is 32.

The square root of 11911955 is about 3451.3700178335. The cubic root of 11911955 is about 228.3815492450.

The spelling of 11911955 in words is "eleven million, nine hundred eleven thousand, nine hundred fifty-five".