53587994489 has 2 divisors, whose sum is σ = 53587994490. Its totient is φ = 53587994488.

The previous prime is 53587994441. The next prime is 53587994501. The reversal of 53587994489 is 98449978535.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53576972089 + 11022400 = 231467^2 + 3320^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53587994489 is a prime.

It is a super-2 number, since 2×53587994489² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (53587994989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26793997244 + 26793997245.

It is an arithmetic number, because the mean of its divisors is an integer number (26793997245).

Almost surely, 2^53587994489 is an apocalyptic number.

It is an amenable number.

53587994489 is a deficient number, since it is larger than the sum of its proper divisors (1).

53587994489 is an equidigital number, since it uses as much as digits as its factorization.

53587994489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 391910400, while the sum is 71.

The spelling of 53587994489 in words is "fifty-three billion, five hundred eighty-seven million, nine hundred ninety-four thousand, four hundred eighty-nine".