49661569 has 4 divisors (see below), whose sum is σ = 49681840. Its totient is φ = 49641300.

The previous prime is 49661561. The next prime is 49661587. The reversal of 49661569 is 96516694.

49661569 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 49661569 - 2³ = 49661561 is a prime.

It is a super-2 number, since 2×49661569² = 4932542871083522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49661561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5859 + ... + 11560.

It is an arithmetic number, because the mean of its divisors is an integer number (12420460).

Almost surely, 2^49661569 is an apocalyptic number.

It is an amenable number.

49661569 is a deficient number, since it is larger than the sum of its proper divisors (20271).

49661569 is a wasteful number, since it uses less digits than its factorization.

49661569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20270.

The product of its digits is 349920, while the sum is 46.

The square root of 49661569 is about 7047.0964943017. The cubic root of 49661569 is about 367.5700737927.

The spelling of 49661569 in words is "forty-nine million, six hundred sixty-one thousand, five hundred sixty-nine".