693805661916461 has 2 divisors, whose sum is σ = 693805661916462. Its totient is φ = 693805661916460.

The previous prime is 693805661916431. The next prime is 693805661916487. The reversal of 693805661916461 is 164619166508396.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 424826965591561 + 268978696324900 = 20611331^2 + 16400570^2 .

It is a cyclic number.

It is not a de Polignac number, because 693805661916461 - 2⁴⁶ = 623436917738797 is a prime.

It is a super-2 number, since 2×693805661916461² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (693805661916401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 346902830958230 + 346902830958231.

It is an arithmetic number, because the mean of its divisors is an integer number (346902830958231).

Almost surely, 2^{693805661916461} is an apocalyptic number.

It is an amenable number.

693805661916461 is a deficient number, since it is larger than the sum of its proper divisors (1).

693805661916461 is an equidigital number, since it uses as much as digits as its factorization.

693805661916461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 302330880, while the sum is 71.

The spelling of 693805661916461 in words is "six hundred ninety-three trillion, eight hundred five billion, six hundred sixty-one million, nine hundred sixteen thousand, four hundred sixty-one".