49697985769 has 2 divisors, whose sum is σ = 49697985770. Its totient is φ = 49697985768.

The previous prime is 49697985739. The next prime is 49697985817. The reversal of 49697985769 is 96758979694.

49697985769 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49467097744 + 230888025 = 222412^2 + 15195^2 .

It is a cyclic number.

It is not a de Polignac number, because 49697985769 - 2⁷ = 49697985641 is a prime.

It is a super-2 number, since 2×49697985769² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (49697985709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24848992884 + 24848992885.

It is an arithmetic number, because the mean of its divisors is an integer number (24848992885).

Almost surely, 2^49697985769 is an apocalyptic number.

It is an amenable number.

49697985769 is a deficient number, since it is larger than the sum of its proper divisors (1).

49697985769 is an equidigital number, since it uses as much as digits as its factorization.

49697985769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1851776640, while the sum is 79.

The spelling of 49697985769 in words is "forty-nine billion, six hundred ninety-seven million, nine hundred eighty-five thousand, seven hundred sixty-nine".