16435778061 has 16 divisors (see below), whose sum is σ = 21979246016. Its totient is φ = 10924782336.

The previous prime is 16435778027. The next prime is 16435778077. The reversal of 16435778061 is 16087753461.

It is not a de Polignac number, because 16435778061 - 2⁷ = 16435777933 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 16435778061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16435778011) 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, 2663766 + ... + 2669928.

It is an arithmetic number, because the mean of its divisors is an integer number (1373702876).

Almost surely, 2^16435778061 is an apocalyptic number.

It is an amenable number.

16435778061 is a deficient number, since it is larger than the sum of its proper divisors (5543467955).

16435778061 is a wasteful number, since it uses less digits than its factorization.

16435778061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8652.

The product of its (nonzero) digits is 846720, while the sum is 48.

The spelling of 16435778061 in words is "sixteen billion, four hundred thirty-five million, seven hundred seventy-eight thousand, sixty-one".