11949561606 has 16 divisors (see below), whose sum is σ = 23914530864. Its totient is φ = 3980619264.

The previous prime is 11949561553. The next prime is 11949561607. The reversal of 11949561606 is 60616594911.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11949561607) 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, 631891 + ... + 650526.

It is an arithmetic number, because the mean of its divisors is an integer number (1494658179).

Almost surely, 2^11949561606 is an apocalyptic number.

11949561606 is an abundant number, since it is smaller than the sum of its proper divisors (11964969258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11949561606 is a wasteful number, since it uses less digits than its factorization.

11949561606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1283975.

The product of its (nonzero) digits is 349920, while the sum is 48.

The spelling of 11949561606 in words is "eleven billion, nine hundred forty-nine million, five hundred sixty-one thousand, six hundred six".