1421776661446 has 16 divisors (see below), whose sum is σ = 2183733566784. Its totient is φ = 693887771304.

The previous prime is 1421776661423. The next prime is 1421776661447. The reversal of 1421776661446 is 6441666771241.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421776661447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5446396 + ... + 5701471.

It is an arithmetic number, because the mean of its divisors is an integer number (136483347924).

Almost surely, 2^{1421776661446} is an apocalyptic number.

1421776661446 is a deficient number, since it is larger than the sum of its proper divisors (761956905338).

1421776661446 is a wasteful number, since it uses less digits than its factorization.

1421776661446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11149395.

The product of its digits is 8128512, while the sum is 55.

The spelling of 1421776661446 in words is "one trillion, four hundred twenty-one billion, seven hundred seventy-six million, six hundred sixty-one thousand, four hundred forty-six".