1646313228540 has 384 divisors, whose sum is σ = 5892745420800. Its totient is φ = 378816860160.

The previous prime is 1646313228491. The next prime is 1646313228587. The reversal of 1646313228540 is 458223136461.

1646313228540 is a `hidden beast` number, since 1 + 6 + 4 + 631 + 3 + 2 + 2 + 8 + 5 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 5254782 + ... + 5559258.

It is an arithmetic number, because the mean of its divisors is an integer number (15345691200).

Almost surely, 2^{1646313228540} is an apocalyptic number.

1646313228540 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 1646313228540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2946372710400).

1646313228540 is an abundant number, since it is smaller than the sum of its proper divisors (4246432192260).

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

1646313228540 is a wasteful number, since it uses less digits than its factorization.

1646313228540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304562 (or 304554 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 45.

The spelling of 1646313228540 in words is "one trillion, six hundred forty-six billion, three hundred thirteen million, two hundred twenty-eight thousand, five hundred forty".