1976655681396 has 72 divisors (see below), whose sum is σ = 5452743651264. Its totient is φ = 598770541440.

The previous prime is 1976655681391. The next prime is 1976655681419. The reversal of 1976655681396 is 6931865566791.

1976655681396 is a `hidden beast` number, since 1 + 9 + 7 + 66 + 556 + 8 + 1 + 3 + 9 + 6 = 666.

It is a Smith number, since the sum of its digits (72) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1976655681391) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 200961 + ... + 1998423.

It is an arithmetic number, because the mean of its divisors is an integer number (75732550712).

Almost surely, 2^{1976655681396} is an apocalyptic number.

It is an amenable number.

1976655681396 is an abundant number, since it is smaller than the sum of its proper divisors (3476087969868).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1976655681396 is a wasteful number, since it uses less digits than its factorization.

1976655681396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1800261 (or 1800256 counting only the distinct ones).

The product of its digits is 440899200, while the sum is 72.

The spelling of 1976655681396 in words is "one trillion, nine hundred seventy-six billion, six hundred fifty-five million, six hundred eighty-one thousand, three hundred ninety-six".