49021148161 has 4 divisors (see below), whose sum is σ = 49078349892. Its totient is φ = 48963946432.

The previous prime is 49021148159. The next prime is 49021148179. The reversal of 49021148161 is 16184112094.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16184112094 = 2 ⋅8092056047.

It can be written as a sum of positive squares in 2 ways, for example, as 38398753936 + 10622394225 = 195956^2 + 103065^2 .

It is a cyclic number.

It is not a de Polignac number, because 49021148161 - 2¹ = 49021148159 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 49021148161.

It is not an unprimeable number, because it can be changed into a prime (49021148101) 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, 28599580 + ... + 28601293.

It is an arithmetic number, because the mean of its divisors is an integer number (12269587473).

Almost surely, 2^49021148161 is an apocalyptic number.

It is an amenable number.

49021148161 is a deficient number, since it is larger than the sum of its proper divisors (57201731).

49021148161 is an equidigital number, since it uses as much as digits as its factorization.

49021148161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57201730.

The product of its (nonzero) digits is 13824, while the sum is 37.

The spelling of 49021148161 in words is "forty-nine billion, twenty-one million, one hundred forty-eight thousand, one hundred sixty-one".