49016561665 has 32 divisors (see below), whose sum is σ = 64638777600. Its totient is φ = 35517081600.

The previous prime is 49016561639. The next prime is 49016561681. The reversal of 49016561665 is 56616561094.

It is a happy number.

It is not a de Polignac number, because 49016561665 - 2¹¹ = 49016559617 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6116181 + ... + 6124189.

It is an arithmetic number, because the mean of its divisors is an integer number (2019961800).

Almost surely, 2^49016561665 is an apocalyptic number.

It is an amenable number.

49016561665 is a deficient number, since it is larger than the sum of its proper divisors (15622215935).

49016561665 is a wasteful number, since it uses less digits than its factorization.

49016561665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10857.

The product of its (nonzero) digits is 1166400, while the sum is 49.

The spelling of 49016561665 in words is "forty-nine billion, sixteen million, five hundred sixty-one thousand, six hundred sixty-five".