49161017969 has 16 divisors (see below), whose sum is σ = 57346176000. Its totient is φ = 42126592032.

The previous prime is 49161017929. The next prime is 49161017977. The reversal of 49161017969 is 96971016194.

It is a happy number.

It is not a de Polignac number, because 49161017969 - 2¹² = 49161013873 is a prime.

It is a super-2 number, since 2×49161017969² (a number of 22 digits) contains 22 as substring.

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 49161017969.

It is not an unprimeable number, because it can be changed into a prime (49161017929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1398197 + ... + 1432925.

It is an arithmetic number, because the mean of its divisors is an integer number (3584136000).

Almost surely, 2^49161017969 is an apocalyptic number.

49161017969 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

It is an amenable number.

49161017969 is a deficient number, since it is larger than the sum of its proper divisors (8185158031).

49161017969 is an equidigital number, since it uses as much as digits as its factorization.

49161017969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38877 (or 38863 counting only the distinct ones).

The product of its (nonzero) digits is 734832, while the sum is 53.

The spelling of 49161017969 in words is "forty-nine billion, one hundred sixty-one million, seventeen thousand, nine hundred sixty-nine".