1621613269248 has 216 divisors, whose sum is σ = 5127310161792. Its totient is φ = 453459750912.

The previous prime is 1621613269187. The next prime is 1621613269279. The reversal of 1621613269248 is 8429623161261.

It is a happy number.

It is a super-3 number, since 3×1621613269248³ (a number of 38 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1621613269248.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1310286 + ... + 2227122.

Almost surely, 2^{1621613269248} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1621613269248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2563655080896).

1621613269248 is an abundant number, since it is smaller than the sum of its proper divisors (3505696892544).

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

1621613269248 is an equidigital number, since it uses as much as digits as its factorization.

1621613269248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 916917 (or 916896 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 51.

The spelling of 1621613269248 in words is "one trillion, six hundred twenty-one billion, six hundred thirteen million, two hundred sixty-nine thousand, two hundred forty-eight".