65422378657 has 2 divisors, whose sum is σ = 65422378658. Its totient is φ = 65422378656.

The previous prime is 65422378649. The next prime is 65422378669. The reversal of 65422378657 is 75687322456.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64272897441 + 1149481216 = 253521^2 + 33904^2 .

It is a cyclic number.

It is not a de Polignac number, because 65422378657 - 2³ = 65422378649 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 65422378598 and 65422378607.

It is not a weakly prime, because it can be changed into another prime (65422378627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32711189328 + 32711189329.

It is an arithmetic number, because the mean of its divisors is an integer number (32711189329).

Almost surely, 2^65422378657 is an apocalyptic number.

It is an amenable number.

65422378657 is a deficient number, since it is larger than the sum of its proper divisors (1).

65422378657 is an equidigital number, since it uses as much as digits as its factorization.

65422378657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16934400, while the sum is 55.

The spelling of 65422378657 in words is "sixty-five billion, four hundred twenty-two million, three hundred seventy-eight thousand, six hundred fifty-seven".