16461662512765 has 4 divisors (see below), whose sum is σ = 19753995015324. Its totient is φ = 13169330010208.

The previous prime is 16461662512693. The next prime is 16461662512781. The reversal of 16461662512765 is 56721526616461.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10278711717849 + 6182950794916 = 3206043^2 + 2486554^2 .

It is a cyclic number.

It is not a de Polignac number, because 16461662512765 - 2¹¹ = 16461662510717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1646166251272 + ... + 1646166251281.

It is an arithmetic number, because the mean of its divisors is an integer number (4938498753831).

Almost surely, 2^{16461662512765} is an apocalyptic number.

It is an amenable number.

16461662512765 is a deficient number, since it is larger than the sum of its proper divisors (3292332502559).

16461662512765 is an equidigital number, since it uses as much as digits as its factorization.

16461662512765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3292332502558.

The product of its digits is 21772800, while the sum is 58.

The spelling of 16461662512765 in words is "sixteen trillion, four hundred sixty-one billion, six hundred sixty-two million, five hundred twelve thousand, seven hundred sixty-five".