49509000000 has 294 divisors, whose sum is σ = 177415736862. Its totient is φ = 13200000000.

The previous prime is 49508999977. The next prime is 49509000001. The reversal of 49509000000 is 90594.

It is a happy number.

49509000000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 7 ways, for example, as 45399677184 + 4109322816 = 213072^2 + 64104^2 .

It is a super-2 number, since 2×49509000000² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49509000001) by changing a digit.

It is a polite number, since it can be written in 41 ways as a sum of consecutive naturals, for example, 8997250 + ... + 9002750.

Almost surely, 2^49509000000 is an apocalyptic number.

49509000000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 49509000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88707868431).

49509000000 is an abundant number, since it is smaller than the sum of its proper divisors (127906736862).

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

49509000000 is an frugal number, since it uses more digits than its factorization.

49509000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5549 (or 5511 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

Adding to 49509000000 its reverse (90594), we get a palindrome (49509090594).

The spelling of 49509000000 in words is "forty-nine billion, five hundred nine million", and thus it is an aban number.