185420540519 has 2 divisors, whose sum is σ = 185420540520. Its totient is φ = 185420540518.

The previous prime is 185420540491. The next prime is 185420540533. The reversal of 185420540519 is 915045024581.

It is a strong prime.

It is an emirp because it is prime and its reverse (915045024581) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-185420540519 is a prime.

It is a super-2 number, since 2×185420540519² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 185420540519.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (185420540579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 92710270259 + 92710270260.

It is an arithmetic number, because the mean of its divisors is an integer number (92710270260).

Almost surely, 2^185420540519 is an apocalyptic number.

185420540519 is a deficient number, since it is larger than the sum of its proper divisors (1).

185420540519 is an equidigital number, since it uses as much as digits as its factorization.

185420540519 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288000, while the sum is 44.

The spelling of 185420540519 in words is "one hundred eighty-five billion, four hundred twenty million, five hundred forty thousand, five hundred nineteen".