1738604787961 has 2 divisors, whose sum is σ = 1738604787962. Its totient is φ = 1738604787960.

The previous prime is 1738604787949. The next prime is 1738604787973. The reversal of 1738604787961 is 1697874068371.

It is a balanced prime because it is at equal distance from previous prime (1738604787949) and next prime (1738604787973).

It can be written as a sum of positive squares in only one way, i.e., 1360619599936 + 377985188025 = 1166456^2 + 614805^2 .

It is a cyclic number.

It is not a de Polignac number, because 1738604787961 - 2⁹ = 1738604787449 is a prime.

It is not a weakly prime, because it can be changed into another prime (1738604787911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 869302393980 + 869302393981.

It is an arithmetic number, because the mean of its divisors is an integer number (869302393981).

Almost surely, 2^{1738604787961} is an apocalyptic number.

It is an amenable number.

1738604787961 is a deficient number, since it is larger than the sum of its proper divisors (1).

1738604787961 is an equidigital number, since it uses as much as digits as its factorization.

1738604787961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 85349376, while the sum is 67.

The spelling of 1738604787961 in words is "one trillion, seven hundred thirty-eight billion, six hundred four million, seven hundred eighty-seven thousand, nine hundred sixty-one".