77745171883 has 2 divisors, whose sum is σ = 77745171884. Its totient is φ = 77745171882.

The previous prime is 77745171859. The next prime is 77745171893. The reversal of 77745171883 is 38817154777.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (38817154777) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77745171883 is a prime.

It is a super-2 number, since 2×77745171883² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (77745171893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38872585941 + 38872585942.

It is an arithmetic number, because the mean of its divisors is an integer number (38872585942).

Almost surely, 2^77745171883 is an apocalyptic number.

77745171883 is a deficient number, since it is larger than the sum of its proper divisors (1).

77745171883 is an equidigital number, since it uses as much as digits as its factorization.

77745171883 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9219840, while the sum is 58.

The spelling of 77745171883 in words is "seventy-seven billion, seven hundred forty-five million, one hundred seventy-one thousand, eight hundred eighty-three".