57785885811 has 64 divisors (see below), whose sum is σ = 87588864000. Its totient is φ = 37645564320.

The previous prime is 57785885803. The next prime is 57785885827. The reversal of 57785885811 is 11858858775.

57785885811 is a `hidden beast` number, since 577 + 8 + 5 + 8 + 8 + 58 + 1 + 1 = 666.

It is not a de Polignac number, because 57785885811 - 2³ = 57785885803 is a prime.

It is a super-2 number, since 2×57785885811² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (57785885611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 134073766 + ... + 134074196.

It is an arithmetic number, because the mean of its divisors is an integer number (1368576000).

Almost surely, 2^57785885811 is an apocalyptic number.

57785885811 is a deficient number, since it is larger than the sum of its proper divisors (29802978189).

57785885811 is a wasteful number, since it uses less digits than its factorization.

57785885811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1021 (or 1015 counting only the distinct ones).

The product of its digits is 25088000, while the sum is 63.

The spelling of 57785885811 in words is "fifty-seven billion, seven hundred eighty-five million, eight hundred eighty-five thousand, eight hundred eleven".