49661615 has 4 divisors (see below), whose sum is σ = 59593944. Its totient is φ = 39729288.

The previous prime is 49661609. The next prime is 49661617. The reversal of 49661615 is 51616694.

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 49661615 - 2¹⁰ = 49660591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49661617) 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 3 ways as a sum of consecutive naturals, for example, 4966157 + ... + 4966166.

It is an arithmetic number, because the mean of its divisors is an integer number (14898486).

Almost surely, 2^49661615 is an apocalyptic number.

49661615 is a deficient number, since it is larger than the sum of its proper divisors (9932329).

49661615 is an equidigital number, since it uses as much as digits as its factorization.

49661615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9932328.

The product of its digits is 38880, while the sum is 38.

The square root of 49661615 is about 7047.0997580565. The cubic root of 49661615 is about 367.5701872824.

The spelling of 49661615 in words is "forty-nine million, six hundred sixty-one thousand, six hundred fifteen".