1448828961821 has 4 divisors (see below), whose sum is σ = 1470453274752. Its totient is φ = 1427204648892.

The previous prime is 1448828961761. The next prime is 1448828961823. The reversal of 1448828961821 is 1281698288441.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1448828961821 is a prime.

It is a super-2 number, since 2×1448828961821² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1448828961823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10812156365 + ... + 10812156498.

It is an arithmetic number, because the mean of its divisors is an integer number (367613318688).

Almost surely, 2^{1448828961821} is an apocalyptic number.

It is an amenable number.

1448828961821 is a deficient number, since it is larger than the sum of its proper divisors (21624312931).

1448828961821 is an equidigital number, since it uses as much as digits as its factorization.

1448828961821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21624312930.

The product of its digits is 14155776, while the sum is 62.

The spelling of 1448828961821 in words is "one trillion, four hundred forty-eight billion, eight hundred twenty-eight million, nine hundred sixty-one thousand, eight hundred twenty-one".