11980797578 has 8 divisors (see below), whose sum is σ = 17974544868. Its totient is φ = 5989282624.

The previous prime is 11980797547. The next prime is 11980797623. The reversal of 11980797578 is 87579708911.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11883834169 + 96963409 = 109013^2 + 9847^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 11980797578.

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, 544601 + ... + 566172.

Almost surely, 2^11980797578 is an apocalyptic number.

11980797578 is a deficient number, since it is larger than the sum of its proper divisors (5993747290).

11980797578 is a wasteful number, since it uses less digits than its factorization.

11980797578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1116168.

The product of its (nonzero) digits is 8890560, while the sum is 62.

The spelling of 11980797578 in words is "eleven billion, nine hundred eighty million, seven hundred ninety-seven thousand, five hundred seventy-eight".