57781145134882 has 16 divisors (see below), whose sum is σ = 95615328348792. Its totient is φ = 26017776420480.

The previous prime is 57781145134873. The next prime is 57781145134897. The reversal of 57781145134882 is 28843154118775.

It is a Cunningham number, because it is equal to 7601391²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 8547501279321 + 49233643855561 = 2923611^2 + 7016669^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27101849373 + ... + 27101851504.

Almost surely, 2^{57781145134882} is an apocalyptic number.

57781145134882 is a deficient number, since it is larger than the sum of its proper divisors (37834183213910).

57781145134882 is a wasteful number, since it uses less digits than its factorization.

57781145134882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54203700933.

The product of its digits is 60211200, while the sum is 64.

The spelling of 57781145134882 in words is "fifty-seven trillion, seven hundred eighty-one billion, one hundred forty-five million, one hundred thirty-four thousand, eight hundred eighty-two".