49165578 has 96 divisors (see below), whose sum is σ = 139875840. Its totient is φ = 12091680.

The previous prime is 49165577. The next prime is 49165591. The reversal of 49165578 is 87556194.

49165578 is a `hidden beast` number, since 4 + 91 + 6 + 557 + 8 = 666.

49165578 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (49165577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25401 + ... + 27267.

It is an arithmetic number, because the mean of its divisors is an integer number (1457040).

Almost surely, 2^49165578 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 49165578, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69937920).

49165578 is an abundant number, since it is smaller than the sum of its proper divisors (90710262).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

49165578 is a wasteful number, since it uses less digits than its factorization.

49165578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1912 (or 1909 counting only the distinct ones).

The product of its digits is 302400, while the sum is 45.

The square root of 49165578 is about 7011.8170255648. The cubic root of 49165578 is about 366.3422848284.

The spelling of 49165578 in words is "forty-nine million, one hundred sixty-five thousand, five hundred seventy-eight".