1669630845540 has 192 divisors, whose sum is σ = 5624847728640. Its totient is φ = 361490895360.

The previous prime is 1669630845497. The next prime is 1669630845577. The reversal of 1669630845540 is 455480369661.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 80675434 + ... + 80696126.

It is an arithmetic number, because the mean of its divisors is an integer number (29296081920).

Almost surely, 2^{1669630845540} is an apocalyptic number.

1669630845540 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 1669630845540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2812423864320).

1669630845540 is an abundant number, since it is smaller than the sum of its proper divisors (3955216883100).

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

1669630845540 is a wasteful number, since it uses less digits than its factorization.

1669630845540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30842 (or 30840 counting only the distinct ones).

The product of its (nonzero) digits is 18662400, while the sum is 57.

The spelling of 1669630845540 in words is "one trillion, six hundred sixty-nine billion, six hundred thirty million, eight hundred forty-five thousand, five hundred forty".