1642125646 has 32 divisors (see below), whose sum is σ = 2870975232. Its totient is φ = 689895360.

The previous prime is 1642125637. The next prime is 1642125647. The reversal of 1642125646 is 6465212461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642125647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 193770 + ... + 202066.

It is an arithmetic number, because the mean of its divisors is an integer number (89717976).

Almost surely, 2^1642125646 is an apocalyptic number.

1642125646 is a deficient number, since it is larger than the sum of its proper divisors (1228849586).

1642125646 is a wasteful number, since it uses less digits than its factorization.

1642125646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8584.

The product of its digits is 69120, while the sum is 37.

The square root of 1642125646 is about 40523.1495074112. The cubic root of 1642125646 is about 1179.7829836469.

The spelling of 1642125646 in words is "one billion, six hundred forty-two million, one hundred twenty-five thousand, six hundred forty-six".