1642381796727 has 12 divisors (see below), whose sum is σ = 2711233442320. Its totient is φ = 938503883808.

The previous prime is 1642381796687. The next prime is 1642381796771. The reversal of 1642381796727 is 7276971832461.

1642381796727 is a `hidden beast` number, since 1 + 6 + 423 + 81 + 79 + 67 + 2 + 7 = 666.

It is not a de Polignac number, because 1642381796727 - 2⁶ = 1642381796663 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63), and also a Moran number because the ratio is a prime number: 26069552329 = 1642381796727 / (1 + 6 + 4 + 2 + 3 + 8 + 1 + 7 + 9 + 6 + 7 + 2 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642381796777) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13034776102 + ... + 13034776227.

Almost surely, 2^{1642381796727} is an apocalyptic number.

1642381796727 is a deficient number, since it is larger than the sum of its proper divisors (1068851645593).

1642381796727 is a wasteful number, since it uses less digits than its factorization.

1642381796727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26069552342 (or 26069552339 counting only the distinct ones).

The product of its digits is 42674688, while the sum is 63.

The spelling of 1642381796727 in words is "one trillion, six hundred forty-two billion, three hundred eighty-one million, seven hundred ninety-six thousand, seven hundred twenty-seven".