1327983993477 has 80 divisors (see below), whose sum is σ = 2094416514432. Its totient is φ = 836909314560.

The previous prime is 1327983993451. The next prime is 1327983993493. The reversal of 1327983993477 is 7743993897231.

1327983993477 is a `hidden beast` number, since 1 + 3 + 2 + 79 + 83 + 9 + 9 + 3 + 477 = 666.

It is not a de Polignac number, because 1327983993477 - 2¹⁴ = 1327983977093 is a prime.

It is a super-2 number, since 2×1327983993477² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1327983993437) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 57925977 + ... + 57948897.

Almost surely, 2^{1327983993477} is an apocalyptic number.

It is an amenable number.

1327983993477 is a deficient number, since it is larger than the sum of its proper divisors (766432520955).

1327983993477 is a wasteful number, since it uses less digits than its factorization.

1327983993477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23320 (or 23311 counting only the distinct ones).

The product of its digits is 432081216, while the sum is 72.

The spelling of 1327983993477 in words is "one trillion, three hundred twenty-seven billion, nine hundred eighty-three million, nine hundred ninety-three thousand, four hundred seventy-seven".