1621434027100 has 18 divisors (see below), whose sum is σ = 3518511839024. Its totient is φ = 648573610800.

The previous prime is 1621434027067. The next prime is 1621434027107. The reversal of 1621434027100 is 17204341261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1621434027107) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8107170036 + ... + 8107170235.

Almost surely, 2^{1621434027100} is an apocalyptic number.

1621434027100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1621434027100 is an abundant number, since it is smaller than the sum of its proper divisors (1897077811924).

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

1621434027100 is a wasteful number, since it uses less digits than its factorization.

1621434027100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16214340285 (or 16214340278 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

Adding to 1621434027100 its reverse (17204341261), we get a palindrome (1638638368361).

The spelling of 1621434027100 in words is "one trillion, six hundred twenty-one billion, four hundred thirty-four million, twenty-seven thousand, one hundred".