1642631941 has 8 divisors (see below), whose sum is σ = 1649476224. Its totient is φ = 1635802560.

The previous prime is 1642631929. The next prime is 1642631959. The reversal of 1642631941 is 1491362461.

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 1642631941 - 2¹⁹ = 1642107653 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1642631941.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642631041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 252370 + ... + 258796.

It is an arithmetic number, because the mean of its divisors is an integer number (206184528).

Almost surely, 2^1642631941 is an apocalyptic number.

It is an amenable number.

1642631941 is a deficient number, since it is larger than the sum of its proper divisors (6844283).

1642631941 is an equidigital number, since it uses as much as digits as its factorization.

1642631941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7451.

The product of its digits is 31104, while the sum is 37.

The square root of 1642631941 is about 40529.3960107969. The cubic root of 1642631941 is about 1179.9042201776.

The spelling of 1642631941 in words is "one billion, six hundred forty-two million, six hundred thirty-one thousand, nine hundred forty-one".