49865427819 has 48 divisors (see below), whose sum is σ = 80656480800. Its totient is φ = 30407783616.

The previous prime is 49865427763. The next prime is 49865427853. The reversal of 49865427819 is 91872456894.

49865427819 is a `hidden beast` number, since 4 + 9 + 8 + 6 + 542 + 7 + 81 + 9 = 666.

It is not a de Polignac number, because 49865427819 - 2²⁴ = 49848650603 is a prime.

It is a super-2 number, since 2×49865427819² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (49865427889) 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 in 47 ways as a sum of consecutive naturals, for example, 194457 + ... + 370869.

It is an arithmetic number, because the mean of its divisors is an integer number (1680343350).

Almost surely, 2^49865427819 is an apocalyptic number.

49865427819 is a deficient number, since it is larger than the sum of its proper divisors (30791052981).

49865427819 is a wasteful number, since it uses less digits than its factorization.

49865427819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176489 (or 176464 counting only the distinct ones).

The product of its digits is 34836480, while the sum is 63.

The spelling of 49865427819 in words is "forty-nine billion, eight hundred sixty-five million, four hundred twenty-seven thousand, eight hundred nineteen".