653458842661 has 2 divisors, whose sum is σ = 653458842662. Its totient is φ = 653458842660.

The previous prime is 653458842613. The next prime is 653458842671. The reversal of 653458842661 is 166248854356.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 473433444225 + 180025398436 = 688065^2 + 424294^2 .

It is a cyclic number.

It is not a de Polignac number, because 653458842661 - 2¹¹ = 653458840613 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 653458842596 and 653458842605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (653458842671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326729421330 + 326729421331.

It is an arithmetic number, because the mean of its divisors is an integer number (326729421331).

Almost surely, 2^653458842661 is an apocalyptic number.

It is an amenable number.

653458842661 is a deficient number, since it is larger than the sum of its proper divisors (1).

653458842661 is an equidigital number, since it uses as much as digits as its factorization.

653458842661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 33177600, while the sum is 58.

The spelling of 653458842661 in words is "six hundred fifty-three billion, four hundred fifty-eight million, eight hundred forty-two thousand, six hundred sixty-one".