11521850451 has 8 divisors (see below), whose sum is σ = 15442066320. Its totient is φ = 7641434112.

The previous prime is 11521850443. The next prime is 11521850479. The reversal of 11521850451 is 15405812511.

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

It is not a de Polignac number, because 11521850451 - 2³ = 11521850443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11521854451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9949206 + ... + 9950363.

It is an arithmetic number, because the mean of its divisors is an integer number (1930258290).

Almost surely, 2^11521850451 is an apocalyptic number.

11521850451 is a deficient number, since it is larger than the sum of its proper divisors (3920215869).

11521850451 is a wasteful number, since it uses less digits than its factorization.

11521850451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19899765.

The product of its (nonzero) digits is 8000, while the sum is 33.

The spelling of 11521850451 in words is "eleven billion, five hundred twenty-one million, eight hundred fifty thousand, four hundred fifty-one".