16765728077 has 32 divisors (see below), whose sum is σ = 20681256960. Its totient is φ = 13279812480.

The previous prime is 16765728073. The next prime is 16765728103. The reversal of 16765728077 is 77082756761.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 16765728077 - 2² = 16765728073 is a prime.

It is a super-2 number, since 2×16765728077² (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 (16765728073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 667574 + ... + 692232.

It is an arithmetic number, because the mean of its divisors is an integer number (646289280).

Almost surely, 2^16765728077 is an apocalyptic number.

It is an amenable number.

16765728077 is a deficient number, since it is larger than the sum of its proper divisors (3915528883).

16765728077 is a wasteful number, since it uses less digits than its factorization.

16765728077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24833.

The product of its (nonzero) digits is 6914880, while the sum is 56.

The spelling of 16765728077 in words is "sixteen billion, seven hundred sixty-five million, seven hundred twenty-eight thousand, seventy-seven".