1921830462601 has 9 divisors (see below), whose sum is σ = 2235609989901. Its totient is φ = 1647274935852.

The previous prime is 1921830462583. The next prime is 1921830462611. The reversal of 1921830462601 is 1062640381291.

The square root of 1921830462601 is 1386301.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 1921830462601 - 2⁷ = 1921830462473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1921830462611) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 9605086 + ... + 9803128.

It is an arithmetic number, because the mean of its divisors is an integer number (248401109989).

Almost surely, 2^{1921830462601} is an apocalyptic number.

1921830462601 is the 1386301-st square number.

1921830462601 is the 693151-st centered octagonal number.

It is an amenable number.

1921830462601 is a deficient number, since it is larger than the sum of its proper divisors (313779527300).

1921830462601 is an frugal number, since it uses more digits than its factorization.

1921830462601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396100 (or 198050 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 43.

The spelling of 1921830462601 in words is "one trillion, nine hundred twenty-one billion, eight hundred thirty million, four hundred sixty-two thousand, six hundred one".