16561250366452 has 48 divisors (see below), whose sum is σ = 32018113209600. Its totient is φ = 7432327618560.

The previous prime is 16561250366443. The next prime is 16561250366501. The reversal of 16561250366452 is 25466305216561.

It is a self number, because there is not a number n which added to its sum of digits gives 16561250366452.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 179903028 + ... + 179995060.

It is an arithmetic number, because the mean of its divisors is an integer number (667044025200).

Almost surely, 2^{16561250366452} is an apocalyptic number.

It is an amenable number.

16561250366452 is a deficient number, since it is larger than the sum of its proper divisors (15456862843148).

16561250366452 is a wasteful number, since it uses less digits than its factorization.

16561250366452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143896 (or 143894 counting only the distinct ones).

The product of its (nonzero) digits is 7776000, while the sum is 52.

The spelling of 16561250366452 in words is "sixteen trillion, five hundred sixty-one billion, two hundred fifty million, three hundred sixty-six thousand, four hundred fifty-two".