1146778057 has 2 divisors, whose sum is σ = 1146778058. Its totient is φ = 1146778056.

The previous prime is 1146778033. The next prime is 1146778063. The reversal of 1146778057 is 7508776411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1046457801 + 100320256 = 32349^2 + 10016^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1146778057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1146777998 and 1146778016.

It is not a weakly prime, because it can be changed into another prime (1146778007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 573389028 + 573389029.

It is an arithmetic number, because the mean of its divisors is an integer number (573389029).

Almost surely, 2^1146778057 is an apocalyptic number.

It is an amenable number.

1146778057 is a deficient number, since it is larger than the sum of its proper divisors (1).

1146778057 is an equidigital number, since it uses as much as digits as its factorization.

1146778057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 329280, while the sum is 46.

The square root of 1146778057 is about 33864.1116375434. Note that the first 3 decimals coincide. The cubic root of 1146778057 is about 1046.7102043614.

The spelling of 1146778057 in words is "one billion, one hundred forty-six million, seven hundred seventy-eight thousand, fifty-seven".