5521121178399 has 12 divisors (see below), whose sum is σ = 7975011790512. Its totient is φ = 3680720232000.

The previous prime is 5521121178389. The next prime is 5521121178413. The reversal of 5521121178399 is 9938711211255.

5521121178399 is a `hidden beast` number, since 5 + 5 + 211 + 21 + 17 + 8 + 399 = 666.

It is not a de Polignac number, because 5521121178399 - 2⁸ = 5521121178143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5521121178379) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 943002 + ... + 3454199.

It is an arithmetic number, because the mean of its divisors is an integer number (664584315876).

Almost surely, 2^{5521121178399} is an apocalyptic number.

5521121178399 is a deficient number, since it is larger than the sum of its proper divisors (2453890612113).

5521121178399 is a wasteful number, since it uses less digits than its factorization.

5521121178399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4536718 (or 4536715 counting only the distinct ones).

The product of its digits is 1360800, while the sum is 54.

The spelling of 5521121178399 in words is "five trillion, five hundred twenty-one billion, one hundred twenty-one million, one hundred seventy-eight thousand, three hundred ninety-nine".