49784621569 has 2 divisors, whose sum is σ = 49784621570. Its totient is φ = 49784621568.

The previous prime is 49784621561. The next prime is 49784621591. The reversal of 49784621569 is 96512648794.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36950450625 + 12834170944 = 192225^2 + 113288^2 .

It is a cyclic number.

It is not a de Polignac number, because 49784621569 - 2³ = 49784621561 is a prime.

It is a super-2 number, since 2×49784621569² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (49784621561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24892310784 + 24892310785.

It is an arithmetic number, because the mean of its divisors is an integer number (24892310785).

Almost surely, 2^49784621569 is an apocalyptic number.

It is an amenable number.

49784621569 is a deficient number, since it is larger than the sum of its proper divisors (1).

49784621569 is an equidigital number, since it uses as much as digits as its factorization.

49784621569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26127360, while the sum is 61.

The spelling of 49784621569 in words is "forty-nine billion, seven hundred eighty-four million, six hundred twenty-one thousand, five hundred sixty-nine".