16765015477 has 12 divisors (see below), whose sum is σ = 20649347820. Its totient is φ = 13524717696.

The previous prime is 16765015469. The next prime is 16765015493. The reversal of 16765015477 is 77451056761.

It can be written as a sum of positive squares in 2 ways, for example, as 10299408196 + 6465607281 = 101486^2 + 80409^2 .

It is not a de Polignac number, because 16765015477 - 2³ = 16765015469 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

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 16765015477.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16765015417) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10062202 + ... + 10063867.

It is an arithmetic number, because the mean of its divisors is an integer number (1720778985).

Almost surely, 2^16765015477 is an apocalyptic number.

16765015477 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

16765015477 is a deficient number, since it is larger than the sum of its proper divisors (3884332343).

16765015477 is a wasteful number, since it uses less digits than its factorization.

16765015477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20126100 (or 20126093 counting only the distinct ones).

The product of its (nonzero) digits is 1234800, while the sum is 49.

The spelling of 16765015477 in words is "sixteen billion, seven hundred sixty-five million, fifteen thousand, four hundred seventy-seven".