16263257566417 has 4 divisors (see below), whose sum is σ = 16263392587956. Its totient is φ = 16263122544880.

The previous prime is 16263257566373. The next prime is 16263257566433. The reversal of 16263257566417 is 71466575236261.

16263257566417 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.

It can be written as a sum of positive squares in 2 ways, for example, as 9410715800721 + 6852541765696 = 3067689^2 + 2617736^2 .

It is a cyclic number.

It is not a de Polignac number, because 16263257566417 - 2⁴³ = 7467164544209 is a prime.

It is a super-3 number, since 3×16263257566417³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16263257566217) 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, 67329934 + ... + 67571047.

It is an arithmetic number, because the mean of its divisors is an integer number (4065848146989).

Almost surely, 2^{16263257566417} is an apocalyptic number.

It is an amenable number.

16263257566417 is a deficient number, since it is larger than the sum of its proper divisors (135021539).

16263257566417 is a wasteful number, since it uses less digits than its factorization.

16263257566417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135021538.

The product of its digits is 76204800, while the sum is 61.

The spelling of 16263257566417 in words is "sixteen trillion, two hundred sixty-three billion, two hundred fifty-seven million, five hundred sixty-six thousand, four hundred seventeen".