1721241494828 has 24 divisors (see below), whose sum is σ = 3114462081024. Its totient is φ = 831486661200.

The previous prime is 1721241494803. The next prime is 1721241494857. The reversal of 1721241494828 is 8284941421271.

It is a self number, because there is not a number n which added to its sum of digits gives 1721241494828.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11358818 + ... + 11509353.

It is an arithmetic number, because the mean of its divisors is an integer number (129769253376).

Almost surely, 2^{1721241494828} is an apocalyptic number.

It is an amenable number.

1721241494828 is a deficient number, since it is larger than the sum of its proper divisors (1393220586196).

1721241494828 is a wasteful number, since it uses less digits than its factorization.

1721241494828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22868813 (or 22868811 counting only the distinct ones).

The product of its digits is 2064384, while the sum is 53.

The spelling of 1721241494828 in words is "one trillion, seven hundred twenty-one billion, two hundred forty-one million, four hundred ninety-four thousand, eight hundred twenty-eight".