1691477221463 has 2 divisors, whose sum is σ = 1691477221464. Its totient is φ = 1691477221462.

The previous prime is 1691477221459. The next prime is 1691477221477. The reversal of 1691477221463 is 3641227741961.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1691477221463 - 2² = 1691477221459 is a prime.

It is a super-2 number, since 2×1691477221463² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1691477221163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 845738610731 + 845738610732.

It is an arithmetic number, because the mean of its divisors is an integer number (845738610732).

Almost surely, 2^{1691477221463} is an apocalyptic number.

1691477221463 is a deficient number, since it is larger than the sum of its proper divisors (1).

1691477221463 is an equidigital number, since it uses as much as digits as its factorization.

1691477221463 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3048192, while the sum is 53.

The spelling of 1691477221463 in words is "one trillion, six hundred ninety-one billion, four hundred seventy-seven million, two hundred twenty-one thousand, four hundred sixty-three".