1642678446763 has 2 divisors, whose sum is σ = 1642678446764. Its totient is φ = 1642678446762.

The previous prime is 1642678446757. The next prime is 1642678446767. The reversal of 1642678446763 is 3676448762461.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1642678446763 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1642678446695 and 1642678446704.

It is not a weakly prime, because it can be changed into another prime (1642678446767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 821339223381 + 821339223382.

It is an arithmetic number, because the mean of its divisors is an integer number (821339223382).

Almost surely, 2^{1642678446763} is an apocalyptic number.

1642678446763 is a deficient number, since it is larger than the sum of its proper divisors (1).

1642678446763 is an equidigital number, since it uses as much as digits as its factorization.

1642678446763 is an evil number, because the sum of its binary digits is even.

The product of its digits is 195084288, while the sum is 64.

The spelling of 1642678446763 in words is "one trillion, six hundred forty-two billion, six hundred seventy-eight million, four hundred forty-six thousand, seven hundred sixty-three".