49659561 has 20 divisors (see below), whose sum is σ = 84781312. Its totient is φ = 28376568.

The previous prime is 49659509. The next prime is 49659583. The reversal of 49659561 is 16595694.

It is a happy number.

It is not a de Polignac number, because 49659561 - 2¹⁰ = 49658537 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (49659361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 43225 + ... + 44358.

Almost surely, 2^49659561 is an apocalyptic number.

It is an amenable number.

49659561 is a deficient number, since it is larger than the sum of its proper divisors (35121751).

49659561 is an equidigital number, since it uses as much as digits as its factorization.

49659561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87602 (or 87593 counting only the distinct ones).

The product of its digits is 291600, while the sum is 45.

The square root of 49659561 is about 7046.9540228385. The cubic root of 49659561 is about 367.5651196557.

The spelling of 49659561 in words is "forty-nine million, six hundred fifty-nine thousand, five hundred sixty-one".