16778410869 has 16 divisors (see below), whose sum is σ = 24407300160. Its totient is φ = 10167759360.

The previous prime is 16778410841. The next prime is 16778410871. The reversal of 16778410869 is 96801487761.

It is a happy number.

It is not a de Polignac number, because 16778410869 - 2⁵ = 16778410837 is a prime.

It is a super-2 number, since 2×16778410869² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16778410169) 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, 482727 + ... + 516315.

It is an arithmetic number, because the mean of its divisors is an integer number (1525456260).

Almost surely, 2^16778410869 is an apocalyptic number.

It is an amenable number.

16778410869 is a deficient number, since it is larger than the sum of its proper divisors (7628889291).

16778410869 is a wasteful number, since it uses less digits than its factorization.

16778410869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48740.

The product of its (nonzero) digits is 4064256, while the sum is 57.

The spelling of 16778410869 in words is "sixteen billion, seven hundred seventy-eight million, four hundred ten thousand, eight hundred sixty-nine".