49142889869 has 2 divisors, whose sum is σ = 49142889870. Its totient is φ = 49142889868.

The previous prime is 49142889833. The next prime is 49142889877. The reversal of 49142889869 is 96898824194.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34967130025 + 14175759844 = 186995^2 + 119062^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49142889869 is a prime.

It is a super-2 number, since 2×49142889869² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 49142889799 and 49142889808.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49142889269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24571444934 + 24571444935.

It is an arithmetic number, because the mean of its divisors is an integer number (24571444935).

Almost surely, 2^49142889869 is an apocalyptic number.

It is an amenable number.

49142889869 is a deficient number, since it is larger than the sum of its proper divisors (1).

49142889869 is an equidigital number, since it uses as much as digits as its factorization.

49142889869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 71663616, while the sum is 68.

The spelling of 49142889869 in words is "forty-nine billion, one hundred forty-two million, eight hundred eighty-nine thousand, eight hundred sixty-nine".