1646142216020 has 24 divisors (see below), whose sum is σ = 3660245634024. Its totient is φ = 619724128256.

The previous prime is 1646142216007. The next prime is 1646142216023. The reversal of 1646142216020 is 206122416461.

It can be written as a sum of positive squares in 4 ways, for example, as 267119450896 + 1379022765124 = 516836^2 + 1174318^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1646142216023) 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, 2420797037 + ... + 2420797716.

It is an arithmetic number, because the mean of its divisors is an integer number (152510234751).

Almost surely, 2^{1646142216020} is an apocalyptic number.

1646142216020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1646142216020 is an abundant number, since it is smaller than the sum of its proper divisors (2014103418004).

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

1646142216020 is a wasteful number, since it uses less digits than its factorization.

1646142216020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4841594779 (or 4841594777 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The spelling of 1646142216020 in words is "one trillion, six hundred forty-six billion, one hundred forty-two million, two hundred sixteen thousand, twenty".