53916375581 has 2 divisors, whose sum is σ = 53916375582. Its totient is φ = 53916375580.

The previous prime is 53916375577. The next prime is 53916375607. The reversal of 53916375581 is 18557361935.

53916375581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39876495481 + 14039880100 = 199691^2 + 118490^2 .

It is a cyclic number.

It is not a de Polignac number, because 53916375581 - 2² = 53916375577 is a prime.

It is a super-2 number, since 2×53916375581² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53916375281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26958187790 + 26958187791.

It is an arithmetic number, because the mean of its divisors is an integer number (26958187791).

Almost surely, 2^53916375581 is an apocalyptic number.

It is an amenable number.

53916375581 is a deficient number, since it is larger than the sum of its proper divisors (1).

53916375581 is an equidigital number, since it uses as much as digits as its factorization.

53916375581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3402000, while the sum is 53.

The spelling of 53916375581 in words is "fifty-three billion, nine hundred sixteen million, three hundred seventy-five thousand, five hundred eighty-one".