1383781648977 has 24 divisors (see below), whose sum is σ = 2460056266304. Its totient is φ = 729906803424.

The previous prime is 1383781648967. The next prime is 1383781648981. The reversal of 1383781648977 is 7798461873831.

1383781648977 is a `hidden beast` number, since 1 + 3 + 8 + 3 + 78 + 1 + 6 + 489 + 77 = 666.

It is not a de Polignac number, because 1383781648977 - 2¹² = 1383781644881 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (1383781648967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 844798723 + ... + 844800360.

Almost surely, 2^{1383781648977} is an apocalyptic number.

It is an amenable number.

1383781648977 is a deficient number, since it is larger than the sum of its proper divisors (1076274617327).

1383781648977 is a wasteful number, since it uses less digits than its factorization.

1383781648977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1689599109 (or 1689599106 counting only the distinct ones).

The product of its digits is 341397504, while the sum is 72.

The spelling of 1383781648977 in words is "one trillion, three hundred eighty-three billion, seven hundred eighty-one million, six hundred forty-eight thousand, nine hundred seventy-seven".