921140550529 has 2 divisors, whose sum is σ = 921140550530. Its totient is φ = 921140550528.

The previous prime is 921140550503. The next prime is 921140550559. The reversal of 921140550529 is 925055041129.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 467602954225 + 453537596304 = 683815^2 + 673452^2 .

It is a cyclic number.

It is not a de Polignac number, because 921140550529 - 2¹⁷ = 921140419457 is a prime.

It is not a weakly prime, because it can be changed into another prime (921140550559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460570275264 + 460570275265.

It is an arithmetic number, because the mean of its divisors is an integer number (460570275265).

Almost surely, 2^921140550529 is an apocalyptic number.

It is an amenable number.

921140550529 is a deficient number, since it is larger than the sum of its proper divisors (1).

921140550529 is an equidigital number, since it uses as much as digits as its factorization.

921140550529 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162000, while the sum is 43.

The spelling of 921140550529 in words is "nine hundred twenty-one billion, one hundred forty million, five hundred fifty thousand, five hundred twenty-nine".