16549787181425 has 12 divisors (see below), whose sum is σ = 21728897052876. Its totient is φ = 12461016230400.

The previous prime is 16549787181413. The next prime is 16549787181451. The reversal of 16549787181425 is 52418178794561.

16549787181425 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 915070167649 + 15634717013776 = 956593^2 + 3954076^2 .

It is not a de Polignac number, because 16549787181425 - 2¹⁰ = 16549787180401 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19470337436 + ... + 19470338285.

It is an arithmetic number, because the mean of its divisors is an integer number (1810741421073).

Almost surely, 2^{16549787181425} is an apocalyptic number.

It is an amenable number.

16549787181425 is a deficient number, since it is larger than the sum of its proper divisors (5179109871451).

16549787181425 is a wasteful number, since it uses less digits than its factorization.

16549787181425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38940675748 (or 38940675743 counting only the distinct ones).

The product of its digits is 135475200, while the sum is 68.

The spelling of 16549787181425 in words is "sixteen trillion, five hundred forty-nine billion, seven hundred eighty-seven million, one hundred eighty-one thousand, four hundred twenty-five".