53562760821 has 12 divisors (see below), whose sum is σ = 77563320172. Its totient is φ = 35618558976.

The previous prime is 53562760753. The next prime is 53562760831. The reversal of 53562760821 is 12806726535.

53562760821 is a `hidden beast` number, since 5 + 3 + 562 + 7 + 6 + 0 + 82 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 28286530596 + 25276230225 = 168186^2 + 158985^2 .

It is not a de Polignac number, because 53562760821 - 2³⁵ = 19203022453 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 (53562760831) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7491916 + ... + 7499061.

Almost surely, 2^53562760821 is an apocalyptic number.

It is an amenable number.

53562760821 is a deficient number, since it is larger than the sum of its proper divisors (24000559351).

53562760821 is a wasteful number, since it uses less digits than its factorization.

53562760821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14991380 (or 14991377 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 45.

The spelling of 53562760821 in words is "fifty-three billion, five hundred sixty-two million, seven hundred sixty thousand, eight hundred twenty-one".