16372697449761 has 15 divisors (see below), whose sum is σ = 24458034541633. Its totient is φ = 10915107355260.

The previous prime is 16372697449709. The next prime is 16372697449777. The reversal of 16372697449761 is 16794479627361.

It is a happy number.

The square root of 16372697449761 is 4046319.

It is a perfect power (a square), and thus also a powerful number.

16372697449761 is a `hidden beast` number, since 1 + 6 + 3 + 7 + 2 + 6 + 9 + 74 + 497 + 61 = 666.

It is not a de Polignac number, because 16372697449761 - 2⁹ = 16372697449249 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16372697449761.

It is not an unprimeable number, because it can be changed into a prime (16372697499761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 36192076 + ... + 36641666.

Almost surely, 2^{16372697449761} is an apocalyptic number.

16372697449761 is the 4046319-th square number.

16372697449761 is the 2023160-th centered octagonal number.

It is an amenable number.

16372697449761 is a deficient number, since it is larger than the sum of its proper divisors (8085337091872).

16372697449761 is an frugal number, since it uses more digits than its factorization.

16372697449761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 899194 (or 449594 counting only the distinct ones).

The product of its digits is 576108288, while the sum is 72.

The spelling of 16372697449761 in words is "sixteen trillion, three hundred seventy-two billion, six hundred ninety-seven million, four hundred forty-nine thousand, seven hundred sixty-one".