542499988861 has 2 divisors, whose sum is σ = 542499988862. Its totient is φ = 542499988860.

The previous prime is 542499988801. The next prime is 542499988883. The reversal of 542499988861 is 168889994245.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 448992464761 + 93507524100 = 670069^2 + 305790^2 .

It is a cyclic number.

It is not a de Polignac number, because 542499988861 - 2³³ = 533910054269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (542499988801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271249994430 + 271249994431.

It is an arithmetic number, because the mean of its divisors is an integer number (271249994431).

Almost surely, 2^542499988861 is an apocalyptic number.

It is an amenable number.

542499988861 is a deficient number, since it is larger than the sum of its proper divisors (1).

542499988861 is an equidigital number, since it uses as much as digits as its factorization.

542499988861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 358318080, while the sum is 73.

The spelling of 542499988861 in words is "five hundred forty-two billion, four hundred ninety-nine million, nine hundred eighty-eight thousand, eight hundred sixty-one".