1609760678401 has 2 divisors, whose sum is σ = 1609760678402. Its totient is φ = 1609760678400.

The previous prime is 1609760678371. The next prime is 1609760678467. The reversal of 1609760678401 is 1048760679061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1171882026225 + 437878652176 = 1082535^2 + 661724^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1609760678401 is a prime.

It is not a weakly prime, because it can be changed into another prime (1609760678501) 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, 804880339200 + 804880339201.

It is an arithmetic number, because the mean of its divisors is an integer number (804880339201).

Almost surely, 2^{1609760678401} is an apocalyptic number.

It is an amenable number.

1609760678401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1609760678401 is an equidigital number, since it uses as much as digits as its factorization.

1609760678401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3048192, while the sum is 55.

The spelling of 1609760678401 in words is "one trillion, six hundred nine billion, seven hundred sixty million, six hundred seventy-eight thousand, four hundred one".