1642144542 has 16 divisors (see below), whose sum is σ = 3323859840. Its totient is φ = 540786392.

The previous prime is 1642144541. The next prime is 1642144549. The reversal of 1642144542 is 2454412461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642144541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1648242 + ... + 1649237.

It is an arithmetic number, because the mean of its divisors is an integer number (207741240).

Almost surely, 2^1642144542 is an apocalyptic number.

1642144542 is an abundant number, since it is smaller than the sum of its proper divisors (1681715298).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1642144542 is a wasteful number, since it uses less digits than its factorization.

1642144542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3297567.

The product of its digits is 30720, while the sum is 33.

The square root of 1642144542 is about 40523.3826574238. The cubic root of 1642144542 is about 1179.7875088983.

The spelling of 1642144542 in words is "one billion, six hundred forty-two million, one hundred forty-four thousand, five hundred forty-two".