1642626643 has 8 divisors (see below), whose sum is σ = 1880132960. Its totient is φ = 1405831680.

The previous prime is 1642626607. The next prime is 1642626653. The reversal of 1642626643 is 3466262461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1642626643 - 2¹³ = 1642618451 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1642626596 and 1642626605.

It is not an unprimeable number, because it can be changed into a prime (1642626653) 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 7 ways as a sum of consecutive naturals, for example, 172878 + ... + 182131.

It is an arithmetic number, because the mean of its divisors is an integer number (235016620).

Almost surely, 2^1642626643 is an apocalyptic number.

1642626643 is a deficient number, since it is larger than the sum of its proper divisors (237506317).

1642626643 is an equidigital number, since it uses as much as digits as its factorization.

1642626643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355677.

The product of its digits is 248832, while the sum is 40.

The square root of 1642626643 is about 40529.3306507769. The cubic root of 1642626643 is about 1179.9029516566.

The spelling of 1642626643 in words is "one billion, six hundred forty-two million, six hundred twenty-six thousand, six hundred forty-three".