645196777763 has 2 divisors, whose sum is σ = 645196777764. Its totient is φ = 645196777762.

The previous prime is 645196777741. The next prime is 645196777783. The reversal of 645196777763 is 367777691546.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 645196777763 - 2³⁴ = 628016908579 is a prime.

It is a super-2 number, since 2×645196777763² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 645196777693 and 645196777702.

It is not a weakly prime, because it can be changed into another prime (645196777703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322598388881 + 322598388882.

It is an arithmetic number, because the mean of its divisors is an integer number (322598388882).

Almost surely, 2^645196777763 is an apocalyptic number.

645196777763 is a deficient number, since it is larger than the sum of its proper divisors (1).

645196777763 is an equidigital number, since it uses as much as digits as its factorization.

645196777763 is an evil number, because the sum of its binary digits is even.

The product of its digits is 280052640, while the sum is 68.

The spelling of 645196777763 in words is "six hundred forty-five billion, one hundred ninety-six million, seven hundred seventy-seven thousand, seven hundred sixty-three".