16563772013325 has 24 divisors (see below), whose sum is σ = 27392706689088. Its totient is φ = 8831666484480.

The previous prime is 16563772013297. The next prime is 16563772013387. The reversal of 16563772013325 is 52331027736561.

It is not a de Polignac number, because 16563772013325 - 2¹⁹ = 16563771489037 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29031292 + ... + 29596341.

It is an arithmetic number, because the mean of its divisors is an integer number (1141362778712).

Almost surely, 2^{16563772013325} is an apocalyptic number.

16563772013325 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16563772013325 is a deficient number, since it is larger than the sum of its proper divisors (10828934675763).

16563772013325 is a wasteful number, since it uses less digits than its factorization.

16563772013325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58631413 (or 58631408 counting only the distinct ones).

The product of its (nonzero) digits is 4762800, while the sum is 51.

Adding to 16563772013325 its reverse (52331027736561), we get a palindrome (68894799749886).

The spelling of 16563772013325 in words is "sixteen trillion, five hundred sixty-three billion, seven hundred seventy-two million, thirteen thousand, three hundred twenty-five".