11955588905 has 8 divisors (see below), whose sum is σ = 15450299592. Its totient is φ = 8828742528.

The previous prime is 11955588881. The next prime is 11955588907. The reversal of 11955588905 is 50988555911.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 724040464 + 11231548441 = 26908^2 + 105979^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 11955588905 - 2²² = 11951394601 is a prime.

It is a super-2 number, since 2×11955588905² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11955588907) 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, 91966004 + ... + 91966133.

It is an arithmetic number, because the mean of its divisors is an integer number (1931287449).

Almost surely, 2^11955588905 is an apocalyptic number.

It is an amenable number.

11955588905 is a deficient number, since it is larger than the sum of its proper divisors (3494710687).

11955588905 is a wasteful number, since it uses less digits than its factorization.

11955588905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183932155.

The product of its (nonzero) digits is 3240000, while the sum is 56.

The spelling of 11955588905 in words is "eleven billion, nine hundred fifty-five million, five hundred eighty-eight thousand, nine hundred five".