1642043427400 has 192 divisors, whose sum is σ = 3942422668800. Its totient is φ = 635703690240.

The previous prime is 1642043427397. The next prime is 1642043427421. The reversal of 1642043427400 is 47243402461.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1642043427400.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 662914962 + ... + 662917438.

It is an arithmetic number, because the mean of its divisors is an integer number (20533451400).

Almost surely, 2^{1642043427400} is an apocalyptic number.

1642043427400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1642043427400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1971211334400).

1642043427400 is an abundant number, since it is smaller than the sum of its proper divisors (2300379241400).

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

1642043427400 is a wasteful number, since it uses less digits than its factorization.

1642043427400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3296 (or 3287 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 37.

Adding to 1642043427400 its reverse (47243402461), we get a palindrome (1689286829861).

The spelling of 1642043427400 in words is "one trillion, six hundred forty-two billion, forty-three million, four hundred twenty-seven thousand, four hundred".