50557773521 has 2 divisors, whose sum is σ = 50557773522. Its totient is φ = 50557773520.

The previous prime is 50557773517. The next prime is 50557773547. The reversal of 50557773521 is 12537775505.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45652732225 + 4905041296 = 213665^2 + 70036^2 .

It is a cyclic number.

It is not a de Polignac number, because 50557773521 - 2² = 50557773517 is a prime.

It is not a weakly prime, because it can be changed into another prime (50557773571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25278886760 + 25278886761.

It is an arithmetic number, because the mean of its divisors is an integer number (25278886761).

Almost surely, 2^50557773521 is an apocalyptic number.

It is an amenable number.

50557773521 is a deficient number, since it is larger than the sum of its proper divisors (1).

50557773521 is an equidigital number, since it uses as much as digits as its factorization.

50557773521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1286250, while the sum is 47.

The spelling of 50557773521 in words is "fifty billion, five hundred fifty-seven million, seven hundred seventy-three thousand, five hundred twenty-one".