16536405877 has 4 divisors (see below), whose sum is σ = 16537942636. Its totient is φ = 16534869120.

The previous prime is 16536405859. The next prime is 16536405889. The reversal of 16536405877 is 77850463561.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4860738961 + 11675666916 = 69719^2 + 108054^2 .

It is a cyclic number.

It is not a de Polignac number, because 16536405877 - 2¹⁵ = 16536373109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16536405817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 752124 + ... + 773797.

It is an arithmetic number, because the mean of its divisors is an integer number (4134485659).

Almost surely, 2^16536405877 is an apocalyptic number.

It is an amenable number.

16536405877 is a deficient number, since it is larger than the sum of its proper divisors (1536759).

16536405877 is a wasteful number, since it uses less digits than its factorization.

16536405877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1536758.

The product of its (nonzero) digits is 4233600, while the sum is 52.

The spelling of 16536405877 in words is "sixteen billion, five hundred thirty-six million, four hundred five thousand, eight hundred seventy-seven".