1620376289280 has 1216 divisors, whose sum is σ = 6828984975360. Its totient is φ = 356725555200.

The previous prime is 1620376289263. The next prime is 1620376289291. The reversal of 1620376289280 is 829826730261.

1620376289280 is a `hidden beast` number, since 1 + 6 + 2 + 0 + 3 + 7 + 628 + 9 + 2 + 8 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

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, 7679508375 + ... + 7679508585.

Almost surely, 2^{1620376289280} is an apocalyptic number.

1620376289280 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 1620376289280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3414492487680).

1620376289280 is an abundant number, since it is smaller than the sum of its proper divisors (5208608686080).

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

1620376289280 is an frugal number, since it uses more digits than its factorization.

1620376289280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299 (or 259 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The spelling of 1620376289280 in words is "one trillion, six hundred twenty billion, three hundred seventy-six million, two hundred eighty-nine thousand, two hundred eighty".