11378006521 has 8 divisors (see below), whose sum is σ = 13168037120. Its totient is φ = 9629126208.

The previous prime is 11378006513. The next prime is 11378006533. The reversal of 11378006521 is 12560087311.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 11378006521 - 2³ = 11378006513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11378006561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10286976 + ... + 10288081.

It is an arithmetic number, because the mean of its divisors is an integer number (1646004640).

Almost surely, 2^11378006521 is an apocalyptic number.

It is an amenable number.

11378006521 is a deficient number, since it is larger than the sum of its proper divisors (1790030599).

11378006521 is an equidigital number, since it uses as much as digits as its factorization.

11378006521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20575143.

The product of its (nonzero) digits is 10080, while the sum is 34.

The spelling of 11378006521 in words is "eleven billion, three hundred seventy-eight million, six thousand, five hundred twenty-one".