1621003550142 has 16 divisors (see below), whose sum is σ = 3242020278672. Its totient is φ = 540332320320.

The previous prime is 1621003550141. The next prime is 1621003550161. The reversal of 1621003550142 is 2410553001261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1621003550141) 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, 1869298 + ... + 2595434.

It is an arithmetic number, because the mean of its divisors is an integer number (202626267417).

Almost surely, 2^{1621003550142} is an apocalyptic number.

1621003550142 is an abundant number, since it is smaller than the sum of its proper divisors (1621016728530).

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

1621003550142 is a wasteful number, since it uses less digits than its factorization.

1621003550142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1098203.

The product of its (nonzero) digits is 7200, while the sum is 30.

The spelling of 1621003550142 in words is "one trillion, six hundred twenty-one billion, three million, five hundred fifty thousand, one hundred forty-two".