53544780391 has 2 divisors, whose sum is σ = 53544780392. Its totient is φ = 53544780390.

The previous prime is 53544780389. The next prime is 53544780397. The reversal of 53544780391 is 19308744535.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 53544780391 - 2¹ = 53544780389 is a prime.

It is a super-2 number, since 2×53544780391² (a number of 22 digits) contains 22 as substring.

Together with 53544780389, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53544780397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26772390195 + 26772390196.

It is an arithmetic number, because the mean of its divisors is an integer number (26772390196).

Almost surely, 2^53544780391 is an apocalyptic number.

53544780391 is a deficient number, since it is larger than the sum of its proper divisors (1).

53544780391 is an equidigital number, since it uses as much as digits as its factorization.

53544780391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1814400, while the sum is 49.

The spelling of 53544780391 in words is "fifty-three billion, five hundred forty-four million, seven hundred eighty thousand, three hundred ninety-one".