11851604947 has 16 divisors (see below), whose sum is σ = 15057129472. Its totient is φ = 9074604960.

The previous prime is 11851604903. The next prime is 11851604953. The reversal of 11851604947 is 74940615811.

It is a cyclic number.

It is not a de Polignac number, because 11851604947 - 2¹¹ = 11851602899 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11851604897 and 11851604906.

It is not an unprimeable number, because it can be changed into a prime (11851604987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2097783 + ... + 2103424.

It is an arithmetic number, because the mean of its divisors is an integer number (941070592).

Almost surely, 2^11851604947 is an apocalyptic number.

11851604947 is a deficient number, since it is larger than the sum of its proper divisors (3205524525).

11851604947 is a wasteful number, since it uses less digits than its factorization.

11851604947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4201258.

The product of its (nonzero) digits is 241920, while the sum is 46.

The spelling of 11851604947 in words is "eleven billion, eight hundred fifty-one million, six hundred four thousand, nine hundred forty-seven".