53975981977 has 2 divisors, whose sum is σ = 53975981978. Its totient is φ = 53975981976.

The previous prime is 53975981947. The next prime is 53975981987. The reversal of 53975981977 is 77918957935.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30057503641 + 23918478336 = 173371^2 + 154656^2 .

It is a cyclic number.

It is not a de Polignac number, because 53975981977 - 2¹¹ = 53975979929 is a prime.

It is not a weakly prime, because it can be changed into another prime (53975981947) 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, 26987990988 + 26987990989.

It is an arithmetic number, because the mean of its divisors is an integer number (26987990989).

Almost surely, 2^53975981977 is an apocalyptic number.

It is an amenable number.

53975981977 is a deficient number, since it is larger than the sum of its proper divisors (1).

53975981977 is an equidigital number, since it uses as much as digits as its factorization.

53975981977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 150028200, while the sum is 70.

The spelling of 53975981977 in words is "fifty-three billion, nine hundred seventy-five million, nine hundred eighty-one thousand, nine hundred seventy-seven".