49561107840 has 384 divisors, whose sum is σ = 181167667200. Its totient is φ = 12449894400.

The previous prime is 49561107767. The next prime is 49561107853. The reversal of 49561107840 is 4870116594.

49561107840 is a `hidden beast` number, since 4 + 9 + 561 + 1 + 0 + 7 + 84 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20901855 + ... + 20904225.

It is an arithmetic number, because the mean of its divisors is an integer number (471790800).

Almost surely, 2^49561107840 is an apocalyptic number.

49561107840 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 49561107840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90583833600).

49561107840 is an abundant number, since it is smaller than the sum of its proper divisors (131606559360).

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

49561107840 is a wasteful number, since it uses less digits than its factorization.

49561107840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2606 (or 2591 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The spelling of 49561107840 in words is "forty-nine billion, five hundred sixty-one million, one hundred seven thousand, eight hundred forty".