1620386145280 has 352 divisors, whose sum is σ = 4664290924800. Its totient is φ = 528374956032.

The previous prime is 1620386145277. The next prime is 1620386145293. The reversal of 1620386145280 is 825416830261.

It is a self number, because there is not a number n which added to its sum of digits gives 1620386145280.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 69625486 + ... + 69648754.

Almost surely, 2^{1620386145280} is an apocalyptic number.

1620386145280 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 1620386145280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2332145462400).

1620386145280 is an abundant number, since it is smaller than the sum of its proper divisors (3043904779520).

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

1620386145280 is a wasteful number, since it uses less digits than its factorization.

1620386145280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23397 (or 23379 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 46.

The spelling of 1620386145280 in words is "one trillion, six hundred twenty billion, three hundred eighty-six million, one hundred forty-five thousand, two hundred eighty".