1671662351465 has 4 divisors (see below), whose sum is σ = 2005994821764. Its totient is φ = 1337329881168.

The previous prime is 1671662351441. The next prime is 1671662351501. The reversal of 1671662351465 is 5641532661761.

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 646076756521 + 1025585594944 = 803789^2 + 1012712^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1671662351465 is a prime.

It is a Duffinian 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, 167166235142 + ... + 167166235151.

It is an arithmetic number, because the mean of its divisors is an integer number (501498705441).

Almost surely, 2^{1671662351465} is an apocalyptic number.

It is an amenable number.

1671662351465 is a deficient number, since it is larger than the sum of its proper divisors (334332470299).

1671662351465 is an equidigital number, since it uses as much as digits as its factorization.

1671662351465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334332470298.

The product of its digits is 5443200, while the sum is 53.

The spelling of 1671662351465 in words is "one trillion, six hundred seventy-one billion, six hundred sixty-two million, three hundred fifty-one thousand, four hundred sixty-five".