11947797146 has 4 divisors (see below), whose sum is σ = 17921695722. Its totient is φ = 5973898572.

The previous prime is 11947797139. The next prime is 11947797157. The reversal of 11947797146 is 64179774911.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 8563466521 + 3384330625 = 92539^2 + 58175^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11947797091 and 11947797100.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2986949285 + ... + 2986949288.

Almost surely, 2^11947797146 is an apocalyptic number.

11947797146 is a deficient number, since it is larger than the sum of its proper divisors (5973898576).

11947797146 is an equidigital number, since it uses as much as digits as its factorization.

11947797146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5973898575.

The product of its digits is 2667168, while the sum is 56.

The spelling of 11947797146 in words is "eleven billion, nine hundred forty-seven million, seven hundred ninety-seven thousand, one hundred forty-six".