1461644981966 has 32 divisors (see below), whose sum is σ = 2376336953088. Its totient is φ = 670266132480.

The previous prime is 1461644981903. The next prime is 1461644981983. The reversal of 1461644981966 is 6691894461641.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3816611 + ... + 4182081.

It is an arithmetic number, because the mean of its divisors is an integer number (74260529784).

Almost surely, 2^{1461644981966} is an apocalyptic number.

1461644981966 is a deficient number, since it is larger than the sum of its proper divisors (914691971122).

1461644981966 is a wasteful number, since it uses less digits than its factorization.

1461644981966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366476.

The product of its digits is 53747712, while the sum is 65.

The spelling of 1461644981966 in words is "one trillion, four hundred sixty-one billion, six hundred forty-four million, nine hundred eighty-one thousand, nine hundred sixty-six".