1642244197 has 16 divisors (see below), whose sum is σ = 1803005568. Its totient is φ = 1483430080.

The previous prime is 1642244171. The next prime is 1642244243. The reversal of 1642244197 is 7914422461.

It is not a de Polignac number, because 1642244197 - 2⁷ = 1642244069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642244497) 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, 1620663 + ... + 1621675.

It is an arithmetic number, because the mean of its divisors is an integer number (112687848).

Almost surely, 2^1642244197 is an apocalyptic number.

It is an amenable number.

1642244197 is a deficient number, since it is larger than the sum of its proper divisors (160761371).

1642244197 is a wasteful number, since it uses less digits than its factorization.

1642244197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1820.

The product of its digits is 96768, while the sum is 40.

The square root of 1642244197 is about 40524.6122375033. The cubic root of 1642244197 is about 1179.8113738998.

The spelling of 1642244197 in words is "one billion, six hundred forty-two million, two hundred forty-four thousand, one hundred ninety-seven".