1642763146 has 4 divisors (see below), whose sum is σ = 2464144722. Its totient is φ = 821381572.

The previous prime is 1642763131. The next prime is 1642763147. The reversal of 1642763146 is 6413672461.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1639359121 + 3404025 = 40489^2 + 1845^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 1642763099 and 1642763108.

It is not an unprimeable number, because it can be changed into a prime (1642763147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410690785 + ... + 410690788.

Almost surely, 2^1642763146 is an apocalyptic number.

1642763146 is a deficient number, since it is larger than the sum of its proper divisors (821381576).

1642763146 is an equidigital number, since it uses as much as digits as its factorization.

1642763146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821381575.

The product of its digits is 145152, while the sum is 40.

The square root of 1642763146 is about 40531.0146184376. The cubic root of 1642763146 is about 1179.9356342369.

The spelling of 1642763146 in words is "one billion, six hundred forty-two million, seven hundred sixty-three thousand, one hundred forty-six".