617613661451 has 2 divisors, whose sum is σ = 617613661452. Its totient is φ = 617613661450.

The previous prime is 617613661421. The next prime is 617613661487. The reversal of 617613661451 is 154166316716.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 617613661451 - 2¹⁸ = 617613399307 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 617613661396 and 617613661405.

It is not a weakly prime, because it can be changed into another prime (617613661411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308806830725 + 308806830726.

It is an arithmetic number, because the mean of its divisors is an integer number (308806830726).

Almost surely, 2^617613661451 is an apocalyptic number.

617613661451 is a deficient number, since it is larger than the sum of its proper divisors (1).

617613661451 is an equidigital number, since it uses as much as digits as its factorization.

617613661451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 47.

The spelling of 617613661451 in words is "six hundred seventeen billion, six hundred thirteen million, six hundred sixty-one thousand, four hundred fifty-one".