10773561821 has 24 divisors (see below), whose sum is σ = 11996493600. Its totient is φ = 9667231200.

The previous prime is 10773561731. The next prime is 10773561823. The reversal of 10773561821 is 12816537701.

It is a happy number.

It is not a de Polignac number, because 10773561821 - 2¹⁰ = 10773560797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10773561823) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3042470 + ... + 3046008.

It is an arithmetic number, because the mean of its divisors is an integer number (499853900).

Almost surely, 2^10773561821 is an apocalyptic number.

10773561821 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10773561821 is a deficient number, since it is larger than the sum of its proper divisors (1222931779).

10773561821 is a wasteful number, since it uses less digits than its factorization.

10773561821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3881 (or 3870 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 41.

The spelling of 10773561821 in words is "ten billion, seven hundred seventy-three million, five hundred sixty-one thousand, eight hundred twenty-one".