11521650047 has 4 divisors (see below), whose sum is σ = 11533516776. Its totient is φ = 11509783320.

The previous prime is 11521650029. The next prime is 11521650059. The reversal of 11521650047 is 74005612511.

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

It is a cyclic number.

It is not a de Polignac number, because 11521650047 - 2¹² = 11521645951 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11521649995 and 11521650022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11521650347) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5931908 + ... + 5933849.

It is an arithmetic number, because the mean of its divisors is an integer number (2883379194).

Almost surely, 2^11521650047 is an apocalyptic number.

11521650047 is a deficient number, since it is larger than the sum of its proper divisors (11866729).

11521650047 is an equidigital number, since it uses as much as digits as its factorization.

11521650047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11866728.

The product of its (nonzero) digits is 8400, while the sum is 32.

The spelling of 11521650047 in words is "eleven billion, five hundred twenty-one million, six hundred fifty thousand, forty-seven".