49561643 has 4 divisors (see below), whose sum is σ = 50042928. Its totient is φ = 49080360.

The previous prime is 49561627. The next prime is 49561657. The reversal of 49561643 is 34616594.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 49561643 - 2⁴ = 49561627 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 49561597 and 49561606.

It is not an unprimeable number, because it can be changed into a prime (49561543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 240488 + ... + 240693.

It is an arithmetic number, because the mean of its divisors is an integer number (12510732).

Almost surely, 2^49561643 is an apocalyptic number.

49561643 is a deficient number, since it is larger than the sum of its proper divisors (481285).

49561643 is a wasteful number, since it uses less digits than its factorization.

49561643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481284.

The product of its digits is 77760, while the sum is 38.

The square root of 49561643 is about 7040.0030539766. The cubic root of 49561643 is about 367.3233741772.

The spelling of 49561643 in words is "forty-nine million, five hundred sixty-one thousand, six hundred forty-three".