57812770649 has 2 divisors, whose sum is σ = 57812770650. Its totient is φ = 57812770648.

The previous prime is 57812770601. The next prime is 57812770787. The reversal of 57812770649 is 94607721875.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52512930649 + 5299840000 = 229157^2 + 72800^2 .

It is a cyclic number.

It is not a de Polignac number, because 57812770649 - 2¹⁶ = 57812705113 is a prime.

It is a super-2 number, since 2×57812770649² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 57812770594 and 57812770603.

It is not a weakly prime, because it can be changed into another prime (57812770549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28906385324 + 28906385325.

It is an arithmetic number, because the mean of its divisors is an integer number (28906385325).

Almost surely, 2^57812770649 is an apocalyptic number.

It is an amenable number.

57812770649 is a deficient number, since it is larger than the sum of its proper divisors (1).

57812770649 is an equidigital number, since it uses as much as digits as its factorization.

57812770649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5927040, while the sum is 56.

The spelling of 57812770649 in words is "fifty-seven billion, eight hundred twelve million, seven hundred seventy thousand, six hundred forty-nine".