51577499993 has 2 divisors, whose sum is σ = 51577499994. Its totient is φ = 51577499992.

The previous prime is 51577499971. The next prime is 51577500049. The reversal of 51577499993 is 39999477515.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29758665049 + 21818834944 = 172507^2 + 147712^2 .

It is a cyclic number.

It is not a de Polignac number, because 51577499993 - 2²⁴ = 51560722777 is a prime.

It is not a weakly prime, because it can be changed into another prime (51577499593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25788749996 + 25788749997.

It is an arithmetic number, because the mean of its divisors is an integer number (25788749997).

Almost surely, 2^51577499993 is an apocalyptic number.

It is an amenable number.

51577499993 is a deficient number, since it is larger than the sum of its proper divisors (1).

51577499993 is an equidigital number, since it uses as much as digits as its factorization.

51577499993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96446700, while the sum is 68.

The spelling of 51577499993 in words is "fifty-one billion, five hundred seventy-seven million, four hundred ninety-nine thousand, nine hundred ninety-three".