49555781 has 16 divisors (see below), whose sum is σ = 57384960. Its totient is φ = 42320880.

The previous prime is 49555769. The next prime is 49555789. The reversal of 49555781 is 18755594.

It is a cyclic number.

It is not a de Polignac number, because 49555781 - 2⁶ = 49555717 is a prime.

It is a super-3 number, since 3×49555781³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49555789) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25610 + ... + 27476.

It is an arithmetic number, because the mean of its divisors is an integer number (3586560).

Almost surely, 2^49555781 is an apocalyptic number.

It is an amenable number.

49555781 is a deficient number, since it is larger than the sum of its proper divisors (7829179).

49555781 is a wasteful number, since it uses less digits than its factorization.

49555781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2024.

The product of its digits is 252000, while the sum is 44.

The square root of 49555781 is about 7039.5867066185. The cubic root of 49555781 is about 367.3088916434.

The spelling of 49555781 in words is "forty-nine million, five hundred fifty-five thousand, seven hundred eighty-one".