53140149781 has 2 divisors, whose sum is σ = 53140149782. Its totient is φ = 53140149780.

The previous prime is 53140149773. The next prime is 53140149787. The reversal of 53140149781 is 18794104135.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35047209681 + 18092940100 = 187209^2 + 134510^2 .

It is a cyclic number.

It is not a de Polignac number, because 53140149781 - 2³ = 53140149773 is a prime.

It is a super-2 number, since 2×53140149781² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53140149787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26570074890 + 26570074891.

It is an arithmetic number, because the mean of its divisors is an integer number (26570074891).

Almost surely, 2^53140149781 is an apocalyptic number.

It is an amenable number.

53140149781 is a deficient number, since it is larger than the sum of its proper divisors (1).

53140149781 is an equidigital number, since it uses as much as digits as its factorization.

53140149781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 43.

The spelling of 53140149781 in words is "fifty-three billion, one hundred forty million, one hundred forty-nine thousand, seven hundred eighty-one".