49520818693 has 2 divisors, whose sum is σ = 49520818694. Its totient is φ = 49520818692.

The previous prime is 49520818687. The next prime is 49520818703. The reversal of 49520818693 is 39681802594.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30290617764 + 19230200929 = 174042^2 + 138673^2 .

It is a cyclic number.

It is not a de Polignac number, because 49520818693 - 2²⁵ = 49487264261 is a prime.

It is a super-2 number, since 2×49520818693² (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 (49520818603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24760409346 + 24760409347.

It is an arithmetic number, because the mean of its divisors is an integer number (24760409347).

Almost surely, 2^49520818693 is an apocalyptic number.

It is an amenable number.

49520818693 is a deficient number, since it is larger than the sum of its proper divisors (1).

49520818693 is an equidigital number, since it uses as much as digits as its factorization.

49520818693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3732480, while the sum is 55.

The spelling of 49520818693 in words is "forty-nine billion, five hundred twenty million, eight hundred eighteen thousand, six hundred ninety-three".