49539634781 has 32 divisors (see below), whose sum is σ = 64671129600. Its totient is φ = 36849608640.

The previous prime is 49539634777. The next prime is 49539634831. The reversal of 49539634781 is 18743693594.

It is not a de Polignac number, because 49539634781 - 2² = 49539634777 is a prime.

It is a super-2 number, since 2×49539634781² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 49539634781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49539634741) 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 31 ways as a sum of consecutive naturals, for example, 117140 + ... + 335858.

It is an arithmetic number, because the mean of its divisors is an integer number (2020972800).

Almost surely, 2^49539634781 is an apocalyptic number.

It is an amenable number.

49539634781 is a deficient number, since it is larger than the sum of its proper divisors (15131494819).

49539634781 is a wasteful number, since it uses less digits than its factorization.

49539634781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218889.

The product of its digits is 19595520, while the sum is 59.

The spelling of 49539634781 in words is "forty-nine billion, five hundred thirty-nine million, six hundred thirty-four thousand, seven hundred eighty-one".