49913816669 has 2 divisors, whose sum is σ = 49913816670. Its totient is φ = 49913816668.

The previous prime is 49913816647. The next prime is 49913816681. The reversal of 49913816669 is 96661831994.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49523161444 + 390655225 = 222538^2 + 19765^2 .

It is a cyclic number.

It is not a de Polignac number, because 49913816669 - 2²⁰ = 49912768093 is a prime.

It is a super-2 number, since 2×49913816669² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49913816609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24956908334 + 24956908335.

It is an arithmetic number, because the mean of its divisors is an integer number (24956908335).

Almost surely, 2^49913816669 is an apocalyptic number.

It is an amenable number.

49913816669 is a deficient number, since it is larger than the sum of its proper divisors (1).

49913816669 is an equidigital number, since it uses as much as digits as its factorization.

49913816669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15116544, while the sum is 62.

The spelling of 49913816669 in words is "forty-nine billion, nine hundred thirteen million, eight hundred sixteen thousand, six hundred sixty-nine".