16347921765 has 96 divisors (see below), whose sum is σ = 32518287360. Its totient is φ = 6850811520.

The previous prime is 16347921763. The next prime is 16347921773. The reversal of 16347921765 is 56712974361.

It is not a de Polignac number, because 16347921765 - 2¹ = 16347921763 is a prime.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16347921763) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1912932 + ... + 1921458.

It is an arithmetic number, because the mean of its divisors is an integer number (338732160).

Almost surely, 2^16347921765 is an apocalyptic number.

16347921765 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16347921765 is a deficient number, since it is larger than the sum of its proper divisors (16170365595).

16347921765 is a wasteful number, since it uses less digits than its factorization.

16347921765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8623 (or 8592 counting only the distinct ones).

The product of its digits is 1905120, while the sum is 51.

The spelling of 16347921765 in words is "sixteen billion, three hundred forty-seven million, nine hundred twenty-one thousand, seven hundred sixty-five".