1768399546 has 4 divisors (see below), whose sum is σ = 2652599322. Its totient is φ = 884199772.

The previous prime is 1768399543. The next prime is 1768399603. The reversal of 1768399546 is 6459938671.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6459938671 = 3217 ⋅2008063.

It can be written as a sum of positive squares in only one way, i.e., 935442225 + 832957321 = 30585^2 + 28861^2 .

It is a super-2 number, since 2×1768399546² = 6254473908586012232, which contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1768399543) 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 as a sum of consecutive naturals, namely, 442099885 + ... + 442099888.

Almost surely, 2^1768399546 is an apocalyptic number.

1768399546 is a deficient number, since it is larger than the sum of its proper divisors (884199776).

1768399546 is an equidigital number, since it uses as much as digits as its factorization.

1768399546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 884199775.

The product of its digits is 9797760, while the sum is 58.

The square root of 1768399546 is about 42052.3429311614. The cubic root of 1768399546 is about 1209.2797995432.

The spelling of 1768399546 in words is "one billion, seven hundred sixty-eight million, three hundred ninety-nine thousand, five hundred forty-six".