1661980083424 has 24 divisors (see below), whose sum is σ = 3277112013000. Its totient is φ = 829697667456.

The previous prime is 1661980083403. The next prime is 1661980083431. The reversal of 1661980083424 is 4243800891661.

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, 40365799 + ... + 40406950.

It is an arithmetic number, because the mean of its divisors is an integer number (136546333875).

Almost surely, 2^{1661980083424} is an apocalyptic number.

It is an amenable number.

1661980083424 is a deficient number, since it is larger than the sum of its proper divisors (1615131929576).

1661980083424 is an equidigital number, since it uses as much as digits as its factorization.

1661980083424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80773402 (or 80773394 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 52.

The spelling of 1661980083424 in words is "one trillion, six hundred sixty-one billion, nine hundred eighty million, eighty-three thousand, four hundred twenty-four".