1621308648960 has 3200 divisors, whose sum is σ = 7977503407104. Its totient is φ = 303853731840.

The previous prime is 1621308648929. The next prime is 1621308649001. The reversal of 1621308648960 is 698468031261.

1621308648960 is a `hidden beast` number, since 1 + 6 + 21 + 3 + 0 + 86 + 489 + 60 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 1621308648897 and 1621308648906.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 319 ways as a sum of consecutive naturals, for example, 15152417227 + ... + 15152417333.

Almost surely, 2^{1621308648960} is an apocalyptic number.

1621308648960 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 1621308648960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3988751703552).

1621308648960 is an abundant number, since it is smaller than the sum of its proper divisors (6356194758144).

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

1621308648960 is a wasteful number, since it uses less digits than its factorization.

1621308648960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246 (or 221 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 54.

The spelling of 1621308648960 in words is "one trillion, six hundred twenty-one billion, three hundred eight million, six hundred forty-eight thousand, nine hundred sixty".