16801523090657 has 4 divisors (see below), whose sum is σ = 16801546993920. Its totient is φ = 16801499187396.

The previous prime is 16801523090609. The next prime is 16801523090663. The reversal of 16801523090657 is 75609032510861.

It is a happy number.

16801523090657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16801523090657 - 2²⁴ = 16801506313441 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16801523090599 and 16801523090608.

It is not an unprimeable number, because it can be changed into a prime (16801523090057) 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, 10864313 + ... + 12314070.

It is an arithmetic number, because the mean of its divisors is an integer number (4200386748480).

Almost surely, 2^{16801523090657} is an apocalyptic number.

It is an amenable number.

16801523090657 is a deficient number, since it is larger than the sum of its proper divisors (23903263).

16801523090657 is an equidigital number, since it uses as much as digits as its factorization.

16801523090657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23903262.

The product of its (nonzero) digits is 2721600, while the sum is 53.

The spelling of 16801523090657 in words is "sixteen trillion, eight hundred one billion, five hundred twenty-three million, ninety thousand, six hundred fifty-seven".