65426978653 has 2 divisors, whose sum is σ = 65426978654. Its totient is φ = 65426978652.

The previous prime is 65426978579. The next prime is 65426978693. The reversal of 65426978653 is 35687962456.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64972990404 + 453988249 = 254898^2 + 21307^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65426978653 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 65426978591 and 65426978600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65426978693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32713489326 + 32713489327.

It is an arithmetic number, because the mean of its divisors is an integer number (32713489327).

Almost surely, 2^65426978653 is an apocalyptic number.

It is an amenable number.

65426978653 is a deficient number, since it is larger than the sum of its proper divisors (1).

65426978653 is an equidigital number, since it uses as much as digits as its factorization.

65426978653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 65318400, while the sum is 61.

The spelling of 65426978653 in words is "sixty-five billion, four hundred twenty-six million, nine hundred seventy-eight thousand, six hundred fifty-three".