11978290906 has 8 divisors (see below), whose sum is σ = 18587003220. Its totient is φ = 5782623168.

The previous prime is 11978290853. The next prime is 11978290969. The reversal of 11978290906 is 60909287911.

It can be written as a sum of positive squares in 2 ways, for example, as 11244693681 + 733597225 = 106041^2 + 27085^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103261071 + ... + 103261186.

Almost surely, 2^11978290906 is an apocalyptic number.

11978290906 is a deficient number, since it is larger than the sum of its proper divisors (6608712314).

11978290906 is a wasteful number, since it uses less digits than its factorization.

11978290906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206522288.

The product of its (nonzero) digits is 489888, while the sum is 52.

The spelling of 11978290906 in words is "eleven billion, nine hundred seventy-eight million, two hundred ninety thousand, nine hundred six".