16520211158057 has 8 divisors (see below), whose sum is σ = 16971706931712. Its totient is φ = 16068978730800.

The previous prime is 16520211157987. The next prime is 16520211158063. The reversal of 16520211158057 is 75085111202561.

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 16520211158057 - 2¹² = 16520211153961 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16520211157999 and 16520211158017.

It is not an unprimeable number, because it can be changed into a prime (16520211158657) 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, 65709419 + ... + 65960352.

It is an arithmetic number, because the mean of its divisors is an integer number (2121463366464).

Almost surely, 2^{16520211158057} is an apocalyptic number.

It is an amenable number.

16520211158057 is a deficient number, since it is larger than the sum of its proper divisors (451495773655).

16520211158057 is a wasteful number, since it uses less digits than its factorization.

16520211158057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131673199.

The product of its (nonzero) digits is 168000, while the sum is 44.

The spelling of 16520211158057 in words is "sixteen trillion, five hundred twenty billion, two hundred eleven million, one hundred fifty-eight thousand, fifty-seven".