16525648833409 has 16 divisors (see below), whose sum is σ = 17642213867520. Its totient is φ = 15454165643280.

The previous prime is 16525648833403. The next prime is 16525648833461. The reversal of 16525648833409 is 90433884652561.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 16525648833409 - 2²¹ = 16525646736257 is a prime.

It is a super-2 number, since 2×16525648833409² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16525648833403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71671249 + ... + 71901454.

It is an arithmetic number, because the mean of its divisors is an integer number (1102638366720).

Almost surely, 2^{16525648833409} is an apocalyptic number.

It is an amenable number.

16525648833409 is a deficient number, since it is larger than the sum of its proper divisors (1116565034111).

16525648833409 is a wasteful number, since it uses less digits than its factorization.

16525648833409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143572860.

The product of its (nonzero) digits is 149299200, while the sum is 64.

The spelling of 16525648833409 in words is "sixteen trillion, five hundred twenty-five billion, six hundred forty-eight million, eight hundred thirty-three thousand, four hundred nine".